If you moved to GA in 2018, then for 2019 you are a resident of GA and a non-resident of NJ. If you have a taxable capital gain on a property sold in 2019 and located in NJ, you would report in on a non-resident NJ return, as well as on your home state GA return. In that situation, you'd be able to take a credit on your GA return for the tax paid to NJ, so you wouldn't be double-taxed.
**Answers are correct to the best of my ability but do not constitute tax or legal advice.
