| Gas City Hainesport | Eastern Time | 00:00 |
| Gas City Gutach | Central European Time | -06:00 |
| Gas City Gustine | Pacific Time | 03:00 |
| Gas City Guthrie | Central Time | 01:00 |
| Gas City Gwoździany | Central European Time | -06:00 |
| Gas City Gymea | Eastern Australia Time | -16:00 |
| Gas City Gympie | Eastern Australia Time | -15:00 |
| Gas City Gyeongju-si | Korean Time | -14:00 |
| Gas City Gzira | Central European Time | -06:00 |
| Gas City Habarakada | India Standard Time | -10:30 |
| Gas City Hackettstown | Eastern Time | 00:00 |
| Gas City Gulf Breeze | Central Time | 01:00 |
| Gas City Gulf Shores | Central Time | 01:00 |
| Gas City Gum Spring | Eastern Time | 00:00 |
| Gas City Gura Râului | Eastern European Time | -07:00 |
| Gas City Gurdaspur | India Standard Time | -10:30 |
| Gas City Gun Barrel City | Central Time | 01:00 |
| Gas City Guniyal Gaon | India Standard Time | -10:30 |
| Gas City Guntersville | Central Time | 01:00 |
| Gas City Gualala | Pacific Time | 03:00 |
| Gas City Guanica | Atlantic Time | -01:00 |
| Gas City Guar Chempedak | Malaysia Time | -13:00 |
| Gas City Grüningen | Central European Time | -06:00 |
| Gas City Guadalupe | Central Time | 01:00 |
| Gas City Grover Beach | Pacific Time | 03:00 |
| Gas City Gruissan | Central European Time | -06:00 |
| Gas City Groton | Eastern Time | 00:00 |
| Gas City Grottammare | Central European Time | -06:00 |
| Gas City Guerneville | Pacific Time | 03:00 |
| Gas City Guildford | Eastern Australia Time | -16:00 |
| Gas City Guardiagrele | Central European Time | -06:00 |
| Gas City Guarne | Colombia Time | 00:00 |
| Gas City Guatapé | Colombia Time | 00:00 |
| Gas City Gudalur | India Standard Time | -10:30 |
| Gas City Guayana City | Venezuela Time | -01:00 |
| Gas City Horsley | Eastern Australia Time | -16:00 |
| Gas City Horseheads | Eastern Time | 00:00 |
| Gas City Hoshiarpur | India Standard Time | -10:30 |
| Gas City Horebeke | Central European Time | -06:00 |
| Gas City Hopland | Pacific Time | 03:00 |
| Gas City Horní Věstonice | Central European Time | -06:00 |
| Gas City Horning | United Kingdom Time | -05:00 |
| Gas City Hope | Central Time | 01:00 |
| Gas City Hope | Pacific Time | 03:00 |
| Gas City Hope Island | Eastern Australia Time | -15:00 |
| Gas City Hooksett | Eastern Time | 00:00 |
| Gas City Honnihalli | India Standard Time | -10:30 |
| Gas City Honiton | United Kingdom Time | -05:00 |
| Gas City Honesdale | Eastern Time | 00:00 |
| Gas City Honfleur | Central European Time | -06:00 |