O.C.G.A. § 29-2-13 (2019)

(a) Within 120 days of the health determination being made, the standby guardian shall file with the probate court in the county of domicile of the minor a petition seeking temporary guardianship of the minor.

(b) Except as otherwise provided, a standby guardianship shall automatically terminate 120 days after the making of the health determination unless the standby guardian has filed a petition for temporary guardianship of the minor, in which case the standby guardianship shall remain in effect, unless otherwise revoked, until the petition is ruled upon.

(c) If the designating individual dies prior to the entering of an order on a petition for guardianship of the minor, as contemplated by subsection (a) of this Code section, the standby guardianship shall be terminated. If the designating individual dies subsequent to the entering of an order on such a petition, the guardianship created pursuant to that order shall terminate in favor of any testamentary designation of a guardian of the minor or, if there is no testamentary designation, to an order on a petition for guardianship brought thereafter and subject to Code Section 29-2-17.