Ga. Code § 22-2-101
This article shall be supplementary to and cumulative of the methods of condemnation described in Articles 1 and 3 of this chapter in cases in which the state, or any branch of the government of the state, or any county, municipality, or other political subdivision of the state, or any housing authority, or any other person possessing the power of eminent domain is concerned. This article is intended to provide a simpler and more effective method of condemnation in those cases where a judicial supervision of the proceedings is desirable by reason of the necessity for a quick determination of the just and adequate compensation to be paid the owner of the property or interest subject to be condemned, or by reason of the number of parties at interest or the conflicting interests of such parties, or in cases where there are parties who are non compos mentis or who are not sui juris or who are nonresidents, or in cases where there are conflicting interests or doubtful questions. In all particulars not otherwise specially provided for in this article, the court shall conform its procedure as nearly as possible to Articles 1 and 3 of this chapter.
OCGA § 22-2-101