Starting with the 9.4 release, tutorials for various subjects are available as Jupyter Notebooks, and are added as subjects as developed. See the following github page for what is currently available:

https://github.com/GeosoftInc/gxpy/tree/master/examples/jupyter_notebooks/Tutorials
(Select the branch that matches the GX Developer version you are working with.)

If you are new to GX Developer, refer to the GX Developer tutorial that is documented as part of the 9.3 release:

Python Tutorial for Geosoft GX Developer