In a private vehicle sale, do I have to pay a tax on two states if the vehicle is registered in FL and I'm taking it to GA?

Location: GA & FL

Buying a Ford van next week. I'm going to need temp tags to bring it back home to Atlanta. Florida asks me to pay sales tax if I'm getting a 30 day temp tag. Georgia asks me for sales tax to register it here. Do I need to pay in both states? Is it possible to get temp tags from Georgia prior to the sale? Or online?