diff --git a/PennMobile/src/main/AndroidManifest.xml b/PennMobile/src/main/AndroidManifest.xml
index c510c0cf..d280bc7f 100644
--- a/PennMobile/src/main/AndroidManifest.xml
+++ b/PennMobile/src/main/AndroidManifest.xml
@@ -27,6 +27,7 @@
         android:theme="@style/AppTheme.Launcher"
         android:usesCleartextTraffic="true"
         tools:targetApi="m">
+
         <receiver
             android:name="com.pennapps.labs.pennmobile.DiningHallWidget"
             android:exported="false">
@@ -39,6 +40,19 @@
                 android:resource="@xml/dining_hall_widget_info" />
         </receiver>
 
+        <receiver
+            android:name="com.pennapps.labs.pennmobile.GsrReservationWidget"
+            android:exported="false">
+            <intent-filter>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
+                <action android:name="android.appwidget.action.ACTION_CLICK" />
+            </intent-filter>
+
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/gsr_reservation_widget_info" />
+        </receiver>
+
         <activity
             android:name=".MainActivity"
             android:exported="true"
@@ -55,6 +69,8 @@
         </activity>
         <service android:name=".adapters.DiningHallWidgetAdapter"
             android:permission="android.permission.BIND_REMOTEVIEWS" />
+        <service android:name=".adapters.GsrReservationWidgetAdapter"
+            android:permission="android.permission.BIND_REMOTEVIEWS" />
 
         <meta-data
             android:name="com.google.android.gms.version"
diff --git a/PennMobile/src/main/java/com/pennapps/labs/pennmobile/GsrReservationWidget.kt b/PennMobile/src/main/java/com/pennapps/labs/pennmobile/GsrReservationWidget.kt
new file mode 100644
index 00000000..09fc9580
--- /dev/null
+++ b/PennMobile/src/main/java/com/pennapps/labs/pennmobile/GsrReservationWidget.kt
@@ -0,0 +1,118 @@
+package com.pennapps.labs.pennmobile
+
+import android.app.PendingIntent
+import android.appwidget.AppWidgetManager
+import android.appwidget.AppWidgetProvider
+import android.content.Context
+import android.content.Intent
+import android.net.Uri
+import android.widget.RemoteViews
+import com.google.gson.GsonBuilder
+import com.google.gson.reflect.TypeToken
+import com.pennapps.labs.pennmobile.adapters.GsrReservationWidgetAdapter
+import com.pennapps.labs.pennmobile.api.GsrReservationsRequest
+import com.pennapps.labs.pennmobile.api.Serializer
+import com.pennapps.labs.pennmobile.classes.GSRReservation
+import com.squareup.okhttp.OkHttpClient
+import retrofit.RestAdapter
+import retrofit.client.OkClient
+import retrofit.converter.GsonConverter
+import java.util.concurrent.TimeUnit
+
+class GsrReservationWidget : AppWidgetProvider() {
+    override fun onUpdate(
+        context: Context,
+        appWidgetManager: AppWidgetManager,
+        appWidgetIds: IntArray,
+    ) {
+        for (appWidgetId in appWidgetIds) {
+            val mainActivityIntent = Intent(context, MainActivity::class.java)
+            mainActivityIntent.apply {
+                flags += Intent.FLAG_ACTIVITY_NEW_TASK
+                flags += Intent.FLAG_ACTIVITY_CLEAR_TOP
+            }
+
+            mainActivityIntent.putExtra("Gsr_Tab_Switch", 1)
+
+            val serviceIntent = Intent(context, GsrReservationWidgetAdapter::class.java)
+            val pendingIntent: PendingIntent =
+                PendingIntent.getActivity(
+                    context,
+                    appWidgetId,
+                    mainActivityIntent,
+                    PendingIntent.FLAG_IMMUTABLE,
+                )
+            serviceIntent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId)
+
+            // setData allows the system to distinguish between different service intents. Without
+            // setData, onGetViewFactory is called only once for multiple widgets and send
+            // the same intent to all of them.
+            serviceIntent.setData(Uri.parse(serviceIntent.toUri(Intent.URI_INTENT_SCHEME)))
+
+            // Setting up the widget remoteViews; change cardview to something else
+            val views = RemoteViews(context.packageName, R.layout.gsr_reservation_widget)
+            views.setRemoteAdapter(R.id.gsr_reservation_widget_stack_view, serviceIntent)
+            views.setEmptyView(
+                R.id.gsr_reservation_widget_stack_view,
+                R.id.gsr_reservation_widget_empty_view,
+            )
+
+            // Setting up the intents for the remoteview for both when it is empty and
+            // when it loads the collection view (in this case we use setPendingIntentTemplate to
+            // the entire stackView that contains all the items).
+            views.setPendingIntentTemplate(R.id.gsr_reservation_widget_stack_view, pendingIntent)
+            views.setOnClickPendingIntent(R.id.gsr_reservation_widget_empty_view, pendingIntent)
+
+            // Notify appwidgetviewdata has changed to call getViewAt to set up the widget UI
+            // and handle update for every appwidget item in the Collection widget.
+            appWidgetManager.notifyAppWidgetViewDataChanged(
+                appWidgetId,
+                R.id.gsr_reservation_widget_stack_view,
+            )
+            appWidgetManager.updateAppWidget(appWidgetId, views)
+        }
+    }
+
+    // onEnabled and onDisabled are typically used for alarmManager testing and logs to check whether
+    // appwidget is properly enabled/disabled.
+    override fun onEnabled(context: Context) {
+    }
+
+    override fun onDisabled(context: Context) {
+    }
+
+    companion object {
+        private var mGSRReservationsRequest: GsrReservationsRequest? = null
+
+        @JvmStatic
+        val gsrReservationsRequestInstance: GsrReservationsRequest
+            get() {
+                if (mGSRReservationsRequest == null) {
+                    val gsonBuilder = GsonBuilder()
+
+                    // RegisterTypeAdapter with GsrReservationSerializer
+                    // since we are only accessing gsr reservations
+                    gsonBuilder.registerTypeAdapter(
+                        object : TypeToken<MutableList<GSRReservation?>?>() {}.type,
+                        Serializer.GsrReservationSerializer(),
+                    )
+
+                    val gson = gsonBuilder.create()
+                    val okHttpClient = OkHttpClient()
+                    okHttpClient.setConnectTimeout(35, TimeUnit.SECONDS) // Connection timeout
+                    okHttpClient.setReadTimeout(35, TimeUnit.SECONDS) // Read timeout
+                    okHttpClient.setWriteTimeout(35, TimeUnit.SECONDS) // Write timeout
+
+                    val restAdapter =
+                        RestAdapter
+                            .Builder()
+                            .setConverter(GsonConverter(gson))
+                            .setClient(OkClient(okHttpClient))
+                            .setEndpoint("https://pennmobile.org/api")
+                            .build()
+                    mGSRReservationsRequest = restAdapter.create(GsrReservationsRequest::class.java)
+                }
+                return mGSRReservationsRequest!!
+            }
+    }
+}
diff --git a/PennMobile/src/main/java/com/pennapps/labs/pennmobile/MainActivity.kt b/PennMobile/src/main/java/com/pennapps/labs/pennmobile/MainActivity.kt
index e7b1ca4f..d40712f9 100644
--- a/PennMobile/src/main/java/com/pennapps/labs/pennmobile/MainActivity.kt
+++ b/PennMobile/src/main/java/com/pennapps/labs/pennmobile/MainActivity.kt
@@ -130,6 +130,15 @@ class MainActivity : AppCompatActivity() {
         if (diningWidgetBroadCast != -1) {
             setTab(DINING_ID)
         }
+
+        var gsrReservationWidgetBroadCast = 0
+        if (intent != null) {
+            gsrReservationWidgetBroadCast =
+                intent.getIntExtra("Gsr_Tab_Switch", -1)
+        }
+        if (gsrReservationWidgetBroadCast != -1) {
+            setTab(GSR_ID)
+        }
     }
 
     private fun onExpandableBottomNavigationItemSelected() {
diff --git a/PennMobile/src/main/java/com/pennapps/labs/pennmobile/adapters/GsrReservationWidgetAdapter.kt b/PennMobile/src/main/java/com/pennapps/labs/pennmobile/adapters/GsrReservationWidgetAdapter.kt
new file mode 100644
index 00000000..8d2e2039
--- /dev/null
+++ b/PennMobile/src/main/java/com/pennapps/labs/pennmobile/adapters/GsrReservationWidgetAdapter.kt
@@ -0,0 +1,137 @@
+package com.pennapps.labs.pennmobile.adapters
+
+import android.appwidget.AppWidgetManager
+import android.content.Context
+import android.content.Intent
+import android.graphics.BitmapFactory
+import android.os.Bundle
+import android.widget.RemoteViews
+import android.widget.RemoteViewsService
+import androidx.preference.PreferenceManager
+import com.google.firebase.crashlytics.FirebaseCrashlytics
+import com.pennapps.labs.pennmobile.GsrReservationWidget
+import com.pennapps.labs.pennmobile.R
+import com.pennapps.labs.pennmobile.api.GsrReservationsRequest
+import com.pennapps.labs.pennmobile.classes.GSRReservation
+import org.joda.time.format.DateTimeFormat
+import org.joda.time.format.DateTimeFormatter
+import rx.Observable
+import java.net.HttpURLConnection
+import java.net.URL
+
+class GsrReservationWidgetAdapter : RemoteViewsService() {
+    override fun onGetViewFactory(intent: Intent): RemoteViewsFactory = GsrReservationWidgetFactory(applicationContext, intent)
+
+    class GsrReservationWidgetFactory(
+        private val context: Context,
+        intent: Intent,
+    ) : RemoteViewsFactory {
+        private var mGsrReservationsRequest: GsrReservationsRequest? = null
+        private var appWidgetId: Int =
+            intent.getIntExtra(
+                AppWidgetManager.EXTRA_APPWIDGET_ID,
+                AppWidgetManager.INVALID_APPWIDGET_ID,
+            )
+        private var dataSet: List<GSRReservation> = emptyList()
+        private var sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
+
+        override fun onCreate() {
+            mGsrReservationsRequest = GsrReservationWidget.gsrReservationsRequestInstance
+            getWidgetGsrReservations()
+        }
+
+        // Not used since already handled
+        override fun onDataSetChanged() {
+        }
+
+        override fun onDestroy() {
+        }
+
+        override fun getCount(): Int = dataSet.size
+
+        // TODO("Get building name(?), and hopefully support click behavior")
+        override fun getViewAt(index: Int): RemoteViews {
+            val reservation = dataSet[index]
+            val roomName = reservation.name
+
+            val formatter: DateTimeFormatter =
+                DateTimeFormat.forPattern("yyyy-MM-dd'T'HH:mm:ssZ")
+            val from = formatter.parseDateTime(reservation.fromDate)
+            val to = formatter.parseDateTime(reservation.toDate)
+            val day = from.toString("EEEE, MMMM d")
+            val fromHour = from.toString("h:mm a")
+            val toHour = to.toString("h:mm a")
+
+            val imageUrl =
+                reservation.info?.get("thumbnail")
+                    ?: "https://s3.us-east-2.amazonaws.com/labs.api/dining/MBA+Cafe.jpg"
+
+            val views = RemoteViews(context.packageName, R.layout.gsr_reservation_widget_item)
+            views.setTextViewText(R.id.gsr_reservation_widget_item_location_tv, roomName)
+            views.setTextViewText(
+                R.id.gsr_reservation_widget_item_time_tv,
+                "$day\n$fromHour-$toHour",
+            )
+
+            try {
+                val urlConnection = URL(imageUrl)
+                val connection =
+                    urlConnection
+                        .openConnection() as HttpURLConnection
+                connection.doInput = true
+                connection.connect()
+                val input = connection.inputStream
+                val myBitmap = BitmapFactory.decodeStream(input)
+                views.setImageViewBitmap(R.id.gsr_reservation_widget_item_iv, myBitmap)
+            } catch (e: Exception) {
+                e.printStackTrace()
+            }
+
+            val extras = Bundle()
+            val fillInIntent = Intent()
+            fillInIntent.putExtras(extras)
+            views.setOnClickFillInIntent(R.id.gsr_reservation_widget_item_root, fillInIntent)
+
+            return views
+        }
+
+        override fun getLoadingView(): RemoteViews? = null
+
+        override fun getViewTypeCount(): Int = 1
+
+        override fun getItemId(id: Int): Long = id.toLong()
+
+        override fun hasStableIds(): Boolean = true
+
+        private fun getWidgetGsrReservations() {
+            try {
+                if (mGsrReservationsRequest != null) {
+                    val token =
+                        sharedPreferences.getString(
+                            context.getString(R.string.access_token),
+                            "",
+                        )
+                    mGsrReservationsRequest!!
+                        .getGsrReservations("Bearer $token")
+                        .flatMap { reservations -> Observable.from(reservations) }
+                        .flatMap { reservation ->
+                            Observable.just(reservation)
+                        }.toList()
+                        .subscribe { reservations ->
+                            dataSet = reservations
+                            println("subscribed")
+                            val appWidgetManager: AppWidgetManager =
+                                AppWidgetManager.getInstance(context)
+                            appWidgetManager.notifyAppWidgetViewDataChanged(
+                                appWidgetId,
+                                R.id.gsr_reservation_widget_stack_view,
+                            )
+                        }
+                }
+            } catch (e: Exception) {
+                FirebaseCrashlytics.getInstance().recordException(e)
+                e.printStackTrace()
+            }
+        }
+    }
+}
diff --git a/PennMobile/src/main/java/com/pennapps/labs/pennmobile/api/DiningRequest.java b/PennMobile/src/main/java/com/pennapps/labs/pennmobile/api/DiningRequest.java
index 4ac8bcc0..7f21aa23 100644
--- a/PennMobile/src/main/java/com/pennapps/labs/pennmobile/api/DiningRequest.java
+++ b/PennMobile/src/main/java/com/pennapps/labs/pennmobile/api/DiningRequest.java
@@ -11,4 +11,4 @@
 public interface DiningRequest {
     @GET("/dining/venues")
     Observable<List<Venue>> venues();
-}
+}
\ No newline at end of file
diff --git a/PennMobile/src/main/java/com/pennapps/labs/pennmobile/api/GsrReservationsRequest.java b/PennMobile/src/main/java/com/pennapps/labs/pennmobile/api/GsrReservationsRequest.java
new file mode 100644
index 00000000..a2e45af6
--- /dev/null
+++ b/PennMobile/src/main/java/com/pennapps/labs/pennmobile/api/GsrReservationsRequest.java
@@ -0,0 +1,22 @@
+package com.pennapps.labs.pennmobile.api;
+
+import com.pennapps.labs.pennmobile.classes.AccessTokenResponse;
+import com.pennapps.labs.pennmobile.classes.GSRReservation;
+import com.pennapps.labs.pennmobile.classes.Venue;
+
+import java.util.List;
+
+import retrofit.Callback;
+import retrofit.http.Field;
+import retrofit.http.FormUrlEncoded;
+import retrofit.http.GET;
+import retrofit.http.Header;
+import retrofit.http.POST;
+import rx.Observable;
+
+public interface GsrReservationsRequest {
+    @GET("/gsr/reservations")
+    Observable<List<GSRReservation>> getGsrReservations(
+            @Header("Authorization") String bearerToken
+    );
+}
\ No newline at end of file
diff --git a/PennMobile/src/main/res/layout/gsr_reservation_widget.xml b/PennMobile/src/main/res/layout/gsr_reservation_widget.xml
new file mode 100644
index 00000000..5e315798
--- /dev/null
+++ b/PennMobile/src/main/res/layout/gsr_reservation_widget.xml
@@ -0,0 +1,33 @@
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="horizontal"
+    android:theme="@style/Theme.Pennmobileandroid.AppWidgetContainer"
+    android:id="@+id/gsr_reservation_widget_root" >
+    <FrameLayout
+        android:id="@+id/widgetframe"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:theme="@style/Theme.Pennmobileandroid.AppWidgetContainer"
+        >
+        <ListView
+            android:id="@+id/gsr_reservation_widget_stack_view"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:loopViews="true"
+            android:divider="@android:color/transparent"
+            android:dividerHeight="8dp"
+            />
+
+        <ImageView
+            android:contentDescription="Penn Logo"
+            android:id="@+id/gsr_reservation_widget_empty_view"
+            android:layout_width="match_parent"
+            android:layout_height="match_parent"
+            android:layout_gravity="center"
+            android:background="@drawable/app_widget_background"
+            android:scaleType="centerCrop"
+            android:src="@drawable/splash_screen435"
+            />
+    </FrameLayout>
+</LinearLayout>
\ No newline at end of file
diff --git a/PennMobile/src/main/res/layout/gsr_reservation_widget_item.xml b/PennMobile/src/main/res/layout/gsr_reservation_widget_item.xml
new file mode 100644
index 00000000..5a979c13
--- /dev/null
+++ b/PennMobile/src/main/res/layout/gsr_reservation_widget_item.xml
@@ -0,0 +1,54 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width = "320dp"
+    android:layout_height = "94dp"
+    android:orientation="horizontal"
+    android:background="#ffffff"
+    android:id="@+id/gsr_reservation_widget_item_root">
+
+    <ImageView
+        android:id="@+id/gsr_reservation_widget_item_iv"
+        android:contentDescription="Gsr Image"
+        android:layout_width="130dp"
+        android:layout_height="76dp"
+        android:layout_marginStart="8dp"
+        android:layout_marginTop="8dp"
+        android:layout_marginBottom="16dp"
+        android:scaleType="centerCrop"
+        app:srcCompat="@color/browser_actions_bg_grey" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="vertical" >
+
+        <TextView
+            android:id=
+                "@+id/gsr_reservation_widget_item_location_tv"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="8dp"
+            android:layout_marginTop="8dp"
+            android:layout_marginEnd="16dp"
+            android:maxLines = "2"
+            android:minLines="2"
+            android:text="VP Weigle Room 110 oiwejfoiwjeof"
+            android:textSize="14sp"
+            android:textStyle="bold" />
+
+        <TextView
+            android:id="@+id/gsr_reservation_widget_item_time_tv"
+            style="@style/Menu"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginStart="8dp"
+            android:layout_marginTop="8dp"
+            android:layout_marginBottom="8dp"
+            android:text="Wednesday September 20 \n2:00pm-3:00 pm"
+            android:textSize="14sp"
+            app:layout_constraintStart_toEndOf="@+id/gsr_reservation_iv"
+            app:layout_constraintTop_toBottomOf="@+id/gsr_reservation_location_tv" />
+    </LinearLayout>
+
+</LinearLayout>
\ No newline at end of file
diff --git a/PennMobile/src/main/res/xml/gsr_reservation_widget_info.xml b/PennMobile/src/main/res/xml/gsr_reservation_widget_info.xml
new file mode 100644
index 00000000..adb16ca4
--- /dev/null
+++ b/PennMobile/src/main/res/xml/gsr_reservation_widget_info.xml
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<appwidget-provider xmlns:android="http://schemas.android.com/apk/res/android"
+    android:description="@string/app_widget_description"
+    android:initialKeyguardLayout="@layout/gsr_reservation_widget"
+    android:initialLayout="@layout/gsr_reservation_widget"
+    android:minWidth="250dp"
+    android:minHeight="40dp"
+    android:previewLayout="@layout/gsr_reservation_widget"
+    android:resizeMode="none"
+    android:targetCellWidth="4"
+    android:targetCellHeight="1"
+    android:updatePeriodMillis="1800000"
+    android:widgetCategory="home_screen" />
\ No newline at end of file