Georgia Code Title 22. Eminent Domain § 22-3-42

If a public road or highway for which condemnation is sought is a part of the state highway system or if jurisdiction or control of the road or highway has been taken over or assumed by the State Transportation Board or other state authority, the notice of intention to condemn shall be addressed to and served upon the commissioner of transportation. If the road or highway is under the supervision or control of county authorities, the notice of intention to condemn shall be addressed to and served upon the judge of the probate court or upon any county commissioner or such other officer as is by law vested with jurisdiction over and control of the public roads of the county in which the road to be condemned is located.