O.C.G.A. § 15-10-261

There shall be no jury trials in the magistrate court. A magistrate court shall not have the power to dispose of the misdemeanor offenses enumerated in subsection (a) of Code Section 15-10-260 unless the defendant shall first waive in writing a trial by jury. If the defendant does not waive a trial by jury, the defendant shall notify the court and, if probable cause exists, the defendant shall be immediately bound over to a court in the county having jurisdiction to try the offense wherein a jury may be impaneled.