Quoted:
18 is the age here.  It can be anywhere in your car as long as your eligible to be issued a GA weapons license.(in other words,  not a felon, domestic violence conviction, insane, and 21 years of age..)


ETA:   anything you need to know is summed up well right HERE

Quoted:
I think this answers my question:

If you are not prohibited by law from owning a firearm you may carry a handgun provided it is unloaded and enclosed inside a case (There is nothing that defines exactly what unloaded means, to be on the safe side you should assume it means no loaded magazine inserted into the gun).

Thanks for the link.

O.C.G.A. § 16-11-126
Possession and carrying a concealed weapon; penalty for violating licensing requirement


(a) Any person who is not prohibited by law from possessing a handgun or long gun may have or carry on his or her person a weapon or long gun on his or her property or inside his or her home, motor vehicle, or place of business without a valid weapons carry license.

(b) Any person who is not prohibited by law from possessing a handgun or long gun may have or carry on his or her person a long gun without a valid weapons carry license, provided that if the long gun is loaded, it shall only be carried in an open and fully exposed manner.

(c) Any person who is not prohibited by law from possessing a handgun or long gun may have or carry any handgun provided that it is enclosed in a case and unloaded.

(d) Any person who is not prohibited by law from possessing a handgun or long gun who is eligible for a weapons carry license may transport a handgun or long gun in any private passenger motor vehicle; provided, however, that private property owners or persons in legal control of property through a lease, rental agreement, licensing agreement, contract, or any other agreement to control access to such property shall have the right to forbid possession of a weapon or long gun on their property, except as provided in Code Section 16-11-135.