If the answer above is None it means there is no specific mention in the legislation, but you still need to ask local law enforcement before drinking in Georgia.
Under the Law on Protecting Minors from Harmful Influences 2001 the sale of alcohol beverages to minors is prohibited. Juvenile Justice Code (2015) Article 3 defines minors as those under 18.
You can find more legal details and links here:
Wikipedia Legal Drinking Page