This is all been covered multiple times, and multiple threads.
Georgia law requires that you ask a prospective gun buyer in a private sale 3 questions.
1. are you legal age?
2. are you a Georgia resident?
3. Are you legally able to own a gun?
if they answer yes to all 3?
Collect your money, hand them the Gun.
(optional, say thank you, nice to meet you. Goodbye.)
I'm curious. Where did you find that in OCGA?