When should I plant my new fig tree?

You can plant it now, make sure the soil has lots of vitamins/good bag of vegetable soil mixed in & water. When it starts to get a little colder, you can actually box the tree in. When I lived in NJ, I actually wrapped the tree up for the winter in blankets, then a final coat of burlap & rope to hold it together. The tree did great ~ can't imagine that GA will be any near the cold temperatures that NJ had. Good luck with the Fig Tree!