| Gebze Mantampay | Philippine Time | -05:00 |
| Gebze Petrozavodsk | Moscow Time | 00:00 |
| Gebze El Daein | Central Africa Time | 01:00 |
| Gebze Umuahia | West Africa Time | 02:00 |
| Gebze Jersey City | Eastern Time | 07:00 |
| Gebze Mianyang | China Time | -05:00 |
| Gebze Sivas | Turkey Time | 00:00 |
| Gebze Oaxaca City | Central Time | 08:00 |
| Gebze Witbank | South Africa Standard Time | 01:00 |
| Gebze Aktobe | West Kazakhstan Time | -02:00 |
| Gebze Paraná | Argentina Time | 06:00 |
| Gebze Jalna | India Standard Time | -02:30 |
| Gebze Lal Bahadur Nagar | India Standard Time | -02:30 |
| Gebze Markham | Eastern Time | 07:00 |
| Gebze Dewas | India Standard Time | -02:30 |
| Gebze Sincelejo | Colombia Time | 08:00 |
| Gebze Tongliao | China Time | -05:00 |
| Gebze Uberaba | Brasilia Time | 06:00 |
| Gebze Chandler | Mountain Time | 10:00 |
| Gebze Fort Wayne | Eastern Time | 07:00 |
| Gebze Plymouth | United Kingdom Time | 02:00 |
| Gebze Baranagar | India Standard Time | -02:30 |
| Gebze Aral | China Time | -05:00 |
| Gebze Nakuru | East Africa Time | 00:00 |
| Gebze Can Tho | Indochina Time | -04:00 |
| Gebze Augsburg | Central European Time | 01:00 |
| Gebze Hiratsuka | Japan Time | -06:00 |
| Gebze Gajuwaka | India Standard Time | -02:30 |
| Gebze Jiujiang | China Time | -05:00 |
| Gebze Jining | China Time | -05:00 |
| Gebze Popayán | Colombia Time | 08:00 |
| Gebze Najrān | Arabian Time | 00:00 |
| Gebze Ciudad Obregón | Mexican Pacific Time | 10:00 |
| Gebze Al Mukalla | Arabian Time | 00:00 |
| Gebze Buffalo | Eastern Time | 07:00 |
| Gebze Luton | United Kingdom Time | 02:00 |
| Gebze Pekalongan | Western Indonesia Time | -04:00 |
| Gebze Cumaná | Venezuela Time | 07:00 |
| Gebze Satna | India Standard Time | -02:30 |
| Gebze Rio Branco | Acre Time | 08:00 |
| Gebze Durham | Eastern Time | 07:00 |
| Gebze Etawah | India Standard Time | -02:30 |
| Gebze Cascavel | Brasilia Time | 06:00 |
| Gebze Saint Petersburg | Eastern Time | 07:00 |
| Gebze L'Hospitalet de Llobregat | Central European Time | 01:00 |
| Gebze Ondo | West Africa Time | 02:00 |
| Gebze Chimoio | Central Africa Time | 01:00 |
| Gebze Espoo | Eastern European Time | 00:00 |
| Gebze Latina | Central European Time | 01:00 |
| Gebze Bratsk | Irkutsk Time | -05:00 |