From what I gather, you will need to use an importer/exporter FFL to bring the gun into the country.......then he will send the gun to your FFL here in GA where you will fill out the 4473. Here is a list of importer/exporter FFL and as you will see......there are not many...
I just don't see a GI in the military (active duty or national guard) walking down the hall in an elementary school with a handgun on his side......I could be wrong but I just don't see it happening. I do think cops can do this.
This will answer many of your questions.
http://www.georgiacarry.org/cms/georgias-carry-laws-explained/frequently-asked-questions/#I_Do_Not_Have_a_Firearms_License