O.C.G.A. § 36-1-25

Official minutes of the meetings of a county governing authority shall be maintained in the offices of the county governing authority. Copies of contracts, maps, or similar material or documents related to actions taken by a county governing authority may be included in the minutes or incorporated by reference to an alternate location. Where incorporated by reference, such documents shall be stored in a central location or locations identified by ordinance or resolution of the county governing authority.