I have no idea what the GMAA is.
The GPAA (Gold Prospectors Association of America) has the claims in the Mining Guide which I believe all need to be renewed each year.
I understand the LDMA actually owns the land their claims are on.
All claims are governed by local county and state laws, even California which has illegally
ignored Federal Mining Laws.
I think both groups were started by Massie.
The LDMA is over priced, but they do make it somewhat painless to join by the low automatic monthly payments available(which includes the GPAA).
Since I seem to have an unquenchable thirst for knowledge, and there's definitely plenty in these groups, I'll hang around for a while. Hopefully I'll gain some wisdom as well, eventually.