| Nominative | γυροσκόπιο |
| Genitive | γυροσκοπίου; γυροσκόπιου |
| Accusative | γυροσκόπιο |
| Vocative | γυροσκόπιο |
| Nominative | gyroskópio |
| Genitive | gyroskopíou; gyroskópiou |
| Accusative | gyroskópio |
| Vocative | gyroskópio |
| Nominative | γυροσκόπια |
| Genitive | γυροσκοπίων |
| Accusative | γυροσκόπια |
| Vocative | γυροσκόπια |
| Nominative | gyroskópia |
| Genitive | gyroskopíon |
| Accusative | gyroskópia |
| Vocative | gyroskópia |