| Gebze Vinnytsia | Eastern European Time | 00:00 |
| Gebze Apodaca | Central Time | 08:00 |
| Gebze Anshun | China Time | -05:00 |
| Gebze Suita | Japan Time | -06:00 |
| Gebze Ixtapaluca | Central Time | 08:00 |
| Gebze Wakayama | Japan Time | -06:00 |
| Gebze Anaheim | Pacific Time | 10:00 |
| Gebze Hualien City | Taipei Time | -05:00 |
| Gebze Lapu-Lapu City | Philippine Time | -05:00 |
| Gebze Diepsloot | South Africa Standard Time | 01:00 |
| Gebze Punasa | India Standard Time | -02:30 |
| Gebze Muzaffarnagar | India Standard Time | -02:30 |
| Gebze Nuevo Laredo | Central Time | 08:00 |
| Gebze Florence | Central European Time | 01:00 |
| Gebze Sanandaj | Iran Time | -01:30 |
| Gebze Latur | India Standard Time | -02:30 |
| Gebze Campina Grande | Brasilia Time | 06:00 |
| Gebze Etobicoke | Eastern Time | 07:00 |
| Gebze Camaguey | Cuba Time | 07:00 |
| Gebze London | Eastern Time | 07:00 |
| Gebze Chifeng | China Time | -05:00 |
| Gebze Hŭngnam | Pyongyang Time | -06:00 |
| Gebze Astana | East Kazakhstan Time | -03:00 |
| Gebze Belgorod | Moscow Time | 00:00 |
| Gebze Kosti | Central Africa Time | 01:00 |
| Gebze Taihecun | China Time | -05:00 |
| Gebze Doha | Arabian Time | 00:00 |
| Gebze Turmero | Venezuela Time | 07:00 |
| Gebze Tláhuac | Central Time | 08:00 |
| Gebze Cuernavaca | Central Time | 08:00 |
| Gebze Kurgan | Yekaterinburg Time | -02:00 |
| Gebze Rangpur | Bangladesh Time | -03:00 |
| Gebze Bhimbar | Pakistan Time | -02:00 |
| Gebze Vitsyebsk | Moscow Time | 00:00 |
| Gebze Soledad | Colombia Time | 08:00 |
| Gebze Shiqi | China Time | -05:00 |
| Gebze Piracicaba | Brasilia Time | 06:00 |
| Gebze Zürich | Central European Time | 01:00 |
| Gebze Kūkatpalli | India Standard Time | -02:30 |
| Gebze Jhang Sadar | Pakistan Time | -02:00 |
| Gebze Arusha | East Africa Time | 00:00 |
| Gebze Ambattur | India Standard Time | -02:30 |
| Gebze Koriyama | Japan Time | -06:00 |
| Gebze Plovdiv | Eastern European Time | 00:00 |
| Gebze Chitungwiza | Central Africa Time | 01:00 |
| Gebze Kashiwa | Japan Time | -06:00 |
| Gebze Latakia | Eastern European Time | 00:00 |
| Gebze Aksu | China Time | -05:00 |
| Gebze Irapuato | Central Time | 08:00 |
| Gebze Tokorozawa | Japan Time | -06:00 |