Georgia Code Title 15. Courts § 15-12-101

(a) When a special grand jury is impaneled pursuant to Code Section 15-12-100, the chief judge of the superior court of the county shall assign a judge of the superior court of the county to supervise and assist the special grand jury in carrying out its investigation and duties. The judge so assigned shall charge the special grand jury as to its powers and duties and shall require periodic reports of the special grand jury's progress, as well as a final report.

(b) When the judge assigned to a special grand jury decides that the special grand jury's investigation has been completed or on the issuance of a report by the special grand jury of the matter investigated by it reporting that the investigation has been completed, the judge so assigned shall recommend to the chief judge of the superior court that the special grand jury be dissolved. The chief judge shall report the recommendation to the judges of the superior court of the county and, upon a majority thereof voting in favor of the dissolution of the special grand jury, the special grand jury shall stand dissolved. If a majority of the judges do not vote in favor of the dissolution of the special grand jury, the chief judge shall instruct and charge the special grand jury as to the particular matters to be investigated; and the special grand jury shall be required to investigate further and establish a period of time within which the investigation shall be completed. At the expiration of the period of time, the special grand jury shall be dissolved.