| Gebze Kut | Arabian Time | 00:00 |
| Gebze Timișoara | Eastern European Time | 00:00 |
| Gebze Vologda | Moscow Time | 00:00 |
| Gebze Şişli | Turkey Time | 00:00 |
| Gebze Lexington-Fayette | Eastern Time | 07:00 |
| Gebze Hull | United Kingdom Time | 02:00 |
| Gebze Soacha | Colombia Time | 08:00 |
| Gebze Coacalco | Central Time | 08:00 |
| Gebze Preston | United Kingdom Time | 02:00 |
| Gebze Ganja | Azerbaijan Time | -01:00 |
| Gebze Lianshan | China Time | -05:00 |
| Gebze Denizli | Turkey Time | 00:00 |
| Gebze Ikeja | West Africa Time | 02:00 |
| Gebze Bonn | Central European Time | 01:00 |
| Gebze Ostrava | Central European Time | 01:00 |
| Gebze Varna | Eastern European Time | 00:00 |
| Gebze Vitoria | Brasilia Time | 06:00 |
| Gebze Tongling | China Time | -05:00 |
| Gebze Iligan City | Philippine Time | -05:00 |
| Gebze Cusco | Peru Time | 08:00 |
| Gebze Maringá | Brasilia Time | 06:00 |
| Gebze Miyazaki | Japan Time | -06:00 |
| Gebze Percut | Western Indonesia Time | -04:00 |
| Gebze Pucallpa | Peru Time | 08:00 |
| Gebze Jingdezhen | China Time | -05:00 |
| Gebze Guarujá | Brasilia Time | 06:00 |
| Gebze Sariwŏn | Pyongyang Time | -06:00 |
| Gebze Vladimir | Moscow Time | 00:00 |
| Gebze Antofagasta | Chile Time | 07:00 |
| Gebze Botshabelo | South Africa Standard Time | 01:00 |
| Gebze Bengkulu | Western Indonesia Time | -04:00 |
| Gebze Butuan City | Philippine Time | -05:00 |
| Gebze Tampico | Central Time | 08:00 |
| Gebze Chita | Chita Time | -06:00 |
| Gebze Newcastle | Eastern Australia Time | -07:00 |
| Gebze Valledupar | Colombia Time | 08:00 |
| Gebze General Escobedo | Central Time | 08:00 |
| Gebze Biskra | Central European Time | 02:00 |
| Gebze Mannheim | Central European Time | 01:00 |
| Gebze Chernihiv | Eastern European Time | 00:00 |
| Gebze Irbid | Eastern European Time | 00:00 |
| Gebze Tumakur | India Standard Time | -02:30 |
| Gebze Jinju | Korean Time | -06:00 |
| Gebze Newport | United Kingdom Time | 02:00 |
| Gebze Tawau | Malaysia Time | -05:00 |
| Gebze Dongying | China Time | -05:00 |
| Gebze Firozabad | India Standard Time | -02:30 |
| Gebze Al Fayyum | Eastern European Time | 01:00 |
| Gebze Porto Velho | Amazon Time | 07:00 |
| Gebze Celaya | Central Time | 08:00 |