| Club | Liga | Sede | Fundación | Estadio |
|---|---|---|---|---|
| Geas Basket | — | Sesto San Giovanni | 1955 | — |
| Giants Basket Marghera | — | Venecia | — | — |
| Gioiosa Milano | — | — | — | — |
| Giovanni Russo Cagliari | — | — | — | — |
| Green Bay Packers | National Football League | — | 1919 | Lambeau Field |
| Grifone Catania | — | Catania | — | — |
| Gruppo Sportivo Bernocchi | Serie A1 | Legnano | 1945 | — |
| GS Trogylos Basket Priolo | — | Priolo Gargallo | 1970 | — |
| GSD Porto Torres | — | Porto Torres | 1996 | — |
| Guerino Vanoli Basket | Lega Basket Serie A | Cremona | 1999 | Palasport Mario Radi |