You would have to contact the vital records office from your home town. You will send in a money order with the name and birthday etc. And they will send the birth certificate via mail. I'm not from Georgia. And this the process I had to go thru.
You did not mention the State for the city of Atlanta call Fulton County Office of Vital Records-
Call the out of state birth certificate office they would have the copy.
Thanks! Your answer is awaiting moderation.