As a non-resident, you can not buy a gun and take it home with you. You may buy and pay for one in GA and have it shipped to an FFL in SC, then pick it up from them.
The only thing CWP does for you (in your home state) is eliminates the need for the background check when buying a gun.
The only thing CWP does for you (in your home state) is eliminates the need for the background check when buying a gun.