You need to report the capital gain in both states. I assume that in prior years you have filed a Georgia resident return and a SC nonresident return.
You will need to do the same this year. In TurboTax, it is important that you prepare your SC nonresident return first including your rental sale (as it is in SC) and your wage income. After that, prepare your Georgia resident return including all your income (required by residents of GA) and you will be able to take a credit on the Georgia return for the taxes you paid in SC. Doing the states in this order will allow TurboTax to determine your tax credit.
