Georgia Code Title 36. Local Government § 36-36-39

(a) Within 30 days of the effective date of the ordinance annexing land to the municipal corporation, any resident elector of the area so annexed or of the municipal corporation or any property owner of such area or of the municipal corporation may bring a petition for declaratory judgment, in the superior court of the county of the legal situs of the annexing municipal corporation, to determine the validity, in accordance with this article, of the application and the municipal corporation's action thereon. Whenever such a petition is filed, the municipal governing body shall file with the court the record of their official actions in regard to such application and a certified copy of the annexing ordinance.

(b) The judgment of the court on any such petition may declare the annexation ordinance null and void upon a finding that the application and the municipal corporation's action thereon are not in substantial compliance with this article. Upon a finding that procedural defects or defects in the plan for service to the annexed area exist, the court, where possible, shall frame a judgment to perfect such defect and uphold the ordinance.

(c) Actions provided for in this Code section shall be in accordance with Chapter 4 of Title 9.

(d) Any aggrieved party may obtain a review of a final judgment under this Code section as is provided by law in other cases.