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