| Singular | Plural | |
|---|---|---|
| Nominativ | gymnasium, gymnasium, gymnasiumque | gymnasia, gymnasia |
| Genitiv | gymnasii, gymnasi, gymnasi, gymnasii | gymnasium, gymnasiorum, gymnasiorum, gymnasium, gymnasiumque |
| Dativ | gymnasio, gymnasio | gymnasiis, gymnasiis |
| Akkusativ | gymnasium, gymnasium, gymnasiumque | gymnasia, gymnasia |
| Ablativ | gymnasio, gymnasio | gymnasiis, gymnasiis |
| Vokativ | gymnasium, gymnasium, gymnasiumque | gymnasia, gymnasia |