The Geodynamic World Builder is a community project that lives by the participation of its members — i.e., including you! It is our goal to build an inclusive and participatory community so we are happy that you are interested in participating!
We describe the process of contributing to the Geodynamic World Builder in our online documentation at:
https://gwb.readthedocs.io/en/latest/developer_manual/start_devel_and_contrib/index.html