If stopped in DeKalb County, you must have the original receipt showing the purchase of your firearm in addition to having your GWL. No receipt means confiscation of your firearm until you can prove actual ownership of the weapon.
Talk about a load of bull. The GCO (Georgia Carry Organization) has a number of complaints issued against the DeKalb County Police Department as well as its police chief. As far as I know, this is still an ongoing issue.