Where is the PCGAMGType man page in 'master' (or 'next' for that
matter)? It is definitely not in petscpc.h and lack of the man page
meant that the list of available types could not be found from other
functions that take a PCGAMGType.
What is the motivation to remove GEO? Do you consider it to be an
active maintenance problem or just that you know how to do it better,
given enough time?