Lots of misinformation in the postings thus far. If you folks were members of GeorgiaCarry, you'd be up to date on all this stuff!
Open carry is perfectly legal in Georgia.
The laws pertaining to weapons in the area of the airport outside TSA are state laws and there is no preemption there.
Part of the Atl Airport is off limits, as defined under "Government Buildings", but not the entire airport. I would suppose the offices of the folks managing the facility, among others. (Source: http://www.georgiapacking.org/GaCode...11§ion=127
It is legal to carry in the non-sterile areas of airports in 42 (forty two) states. (Source: http://www.georgiacarry.org/cms/abou...title=Airports