I’m thinking “otherwise prohibited” is for felons and non felons with domestic abuse charges. As well, any business that deems themselves to be “gun free zones” are to be avoided. One rule still applies everywhere. The bad guys carry anywhere they feel like it.
The GA gun law explicitly says churches can opt out of CC. If they don’t opt out then you can carry in church.
The GA law does specifically state that you can carry in church but that individual churches can opt out. We usually honor the signs on business’s that say no guns. We just don’t go in there. Costco is the only place we just have not been willing to give up. :-)