O.C.G.A. 15-11-153.1 (2010)
15-11-153.1. Disposition of proceeding when child determined mentally incompetent

(a) If the court determines that a child is mentally incompetent, is dependent, or is alleged to have committed an unruly act or an act which would be a misdemeanor if committed by an adult, the court may dismiss the petition without prejudice.

(b) A child who is found to be mentally incompetent shall not be subject to discretionary transfer to superior court, adjudication, disposition, or modification of disposition provided that the mental incompetency exists.