QLiteOSD v1.2
*NOTE: v1.1 and had the GPS TX and RX pins reversed. This is now corrected in v1.2.
GPS / QLiteOSD
VCC -> VCC (3.3v)
GND -> GND
RX -> TX
TX -> RX
If upgrading from 1.1 to 1.2 make sure you have correctly swapped the RX -> TX pins on the GPS.