Each state is different but its usually is a safety inspection - checking to see that all safety features for the car for the year registered (often an important point) are there and functions. So brakes, wipers, lights, rear view mirror, exhaust, horn, tires, seatbelts and perhaps check of Chassis/VIN plate. Highly populated areas also have emissions inspections.
I'd sure go for: the GA Hobby Antique tag
This tag may be issued to a motor vehicle (private passenger car, truck weighing less than 14,000 lbs., or motorcycle) that is more than twenty-five (25) years old or to a vehicle that has been designed and manufactured to resemble an antique or historical vehicle.
Check the GA DMV site or DMV.ORG