Georgia Code Title 21. Elections § 21-2-403

(a) At all primaries and elections the polls shall be opened at 7:00 A.M. eastern standard time or eastern daylight time, whichever is applicable, and shall remain open continuously until 7:00 P.M. eastern standard time or eastern daylight time, whichever is applicable, at which time they shall be closed; provided, however, that, in all cities having a population of 300,000 or more according to the United States decennial census of 1970 or any future such census, the polls shall remain open continuously until 8:00 P.M. eastern standard time or eastern daylight time, whichever is applicable, during the cities' general elections, at which time they shall be closed and provided, further, that, in a special election held to fill a vacancy in an office in which the district represented by such office lies wholly within the boundaries of a city, the polls shall close at the same time as for a municipal general election in such city.

(b) Poll hours at a precinct may be extended only by order of a judge of the superior court of the county in which the precinct is located upon good cause shown by clear and convincing evidence that persons were unable to vote at that precinct during a specific period or periods of time. Poll hours shall not be extended longer than the total amount of time during which persons were unable to vote at such precinct. Any order extending poll hours at a precinct beyond 9:00 P.M. shall be by written order with specific findings of fact supporting such extension.