Any native pine tree in Georgia has edible inner bark, which supposedly has tons of nutrients including fat and protein. If they're older loblollies, you may have to climb to get to the younger branches, which would make them less useful. If they're white pine, that's kind of rare for metro Atlanta, so you might keep them around for that reason. White pines can be useful for fire-making in addition to edible bark. Virginia pine is where fat lighter comes from.
Make sure you cook the inner bark if you're eating more than a couple small pieces.