As I know it, and I could be wrong, there is no "public" land. So, unlike TX and where I am from in CA, you cannot just drive down the road and have 50 miles of nothing to shoot on freely or hike and camp. GA seems different like that. We have WMAs with small designated shooting ranges and a number of gun clubs you can join though. In your little box there you have a massive national forest. In my opinion that there is the beauty of GA so if you can get your land connected to it that could be a plus. Thew West side of that box makes TX and TN easier and is less populated. The East makes NC easier and you are a little closer to the ocean. Neither side has an easy route to the other so choose wisely.
Atlanta traffic is about the worst I have ever seen anywhere so live as close to your work as possible.