O.C.G.A. § 48-5-237

A taxpayer who has a portion of real property extending into more than one county may pay all property taxes due on the property to the tax collector or tax commissioner of the county where the majority of the property is located. Nothing contained in this Code section shall change the amount of tax due each county, but this Code section shall change only the place of payment and collection. The tax collector or tax commissioner of the county of collection shall transmit to the tax collector or tax commissioner of the other counties the moneys due the other counties and a certificate showing that all taxes due on the property have been paid.