| Gebze Muzaffarabad | Pakistan Time | -02:00 |
| Gebze Guadalupe | Central Time | 08:00 |
| Gebze Bağcılar | Turkey Time | 00:00 |
| Gebze Sulaymaniyah | Arabian Time | 00:00 |
| Gebze Cúcuta | Colombia Time | 08:00 |
| Gebze Moradabad | India Standard Time | -02:30 |
| Gebze N'Djamena | West Africa Time | 02:00 |
| Gebze Langfang | China Time | -05:00 |
| Gebze Zhumadian | China Time | -05:00 |
| Gebze Yantai | China Time | -05:00 |
| Gebze Lviv | Eastern European Time | 00:00 |
| Gebze Merida | Central Time | 08:00 |
| Gebze Tlalnepantla | Central Time | 08:00 |
| Gebze Edmonton | Mountain Time | 09:00 |
| Gebze Jeonju-si | Korean Time | -06:00 |
| Gebze Zhuzhou | China Time | -05:00 |
| Gebze Subang Jaya | Malaysia Time | -05:00 |
| Gebze Bhiwandi | India Standard Time | -02:30 |
| Gebze Pekanbaru | Western Indonesia Time | -04:00 |
| Gebze Seville | Central European Time | 01:00 |
| Gebze Tolyatti | Samara Time | -01:00 |
| Gebze Jaboatão | Brasilia Time | 06:00 |
| Gebze Shizuoka | Japan Time | -06:00 |
| Gebze Santo Domingo Oeste | Atlantic Time | 07:00 |
| Gebze Rajshahi | Bangladesh Time | -03:00 |
| Gebze City of Balikpapan | Central Indonesia Time | -05:00 |
| Gebze Changzhi | China Time | -05:00 |
| Gebze Bulawayo | Central Africa Time | 01:00 |
| Gebze Zagreb | Central European Time | 01:00 |
| Gebze Agadir | Western European Time | 02:00 |
| Gebze Sarajevo | Central European Time | 01:00 |
| Gebze La Plata | Argentina Time | 06:00 |
| Gebze Tunis | Central European Time | 02:00 |
| Gebze Zhangjiakou | China Time | -05:00 |
| Gebze Zigong | China Time | -05:00 |
| Gebze Fuxin | China Time | -05:00 |
| Gebze Enugu | West Africa Time | 02:00 |
| Gebze Tangier | Western European Time | 02:00 |
| Gebze Huangshi | China Time | -05:00 |
| Gebze Liaoyang | China Time | -05:00 |
| Gebze Sheffield | United Kingdom Time | 02:00 |
| Gebze Seattle | Pacific Time | 10:00 |
| Gebze Denver | Mountain Time | 09:00 |
| Gebze El Paso | Mountain Time | 09:00 |
| Gebze Kumamoto | Japan Time | -06:00 |
| Gebze Raipur | India Standard Time | -02:30 |
| Gebze General Santos | Philippine Time | -05:00 |
| Gebze Dushanbe | Tajikistan Time | -02:00 |
| Gebze Osasco | Brasilia Time | 06:00 |
| Gebze San Luis Potosi | Central Time | 08:00 |