I think this pretty much sums it up, however what's it say about a church if they ask u to leave...So, my interpretation of what GA Gun Law Book said.
A church must allow carry for it to be legal for anyone.
If a church allows carry, it is open for everyone, however, they have the right to ask you to leave if they don't want you there carrying.
So, if the church allows carry, you cannot be prosecuted for carrying in a church if caught, only prosecuted if asked to leave and you do not.
So, a church's policy can be "We allow carry for select members. If you are caught carrying without permission, you may be asked to leave".
Rosewood