Ga. Const. art. VI, § VI, para. I

Composition of Supreme Court; Chief Justice; Presiding Justice; quorum; substitute judges. The Supreme Court shall consist of not more than nine Justices who shall elect from among themselves a Chief Justice as the chief presiding and administrative officer of the court and a Presiding Justice to serve if the Chief Justice is absent or is disqualified. A majority shall be necessary to hear and determine cases. If a Justice is disqualified in any case, a substitute judge may be designated by the remaining Justices to serve.