| Club | Liga | Sede | Fundación | Estadio |
|---|---|---|---|---|
| Gad Etna Catania | — | — | — | — |
| Geas Basket | — | Sesto San Giovanni | 1955 | — |
| Gioiosa Milano | — | — | — | — |
| Giovanni Russo Cagliari | — | — | — | — |
| Golden State Warriors | National Basketball Association | San Francisco | 1946 | Philadelphia Arena, SAP Center, Philadelphia Convention Hall and Civic Center, Cow Palace, Oracle Arena, War Memorial Gymnasium, Bill Graham Civic Auditorium, Chase Center |
| Green Bay Packers | National Football League | — | 1919 | Lambeau Field |
| Grifone Catania | — | Catania | — | — |
| Gruppo Universitario Fascista Agrigento | — | Agrigento | — | — |
| GSD Porto Torres | — | Porto Torres | 1996 | — |
| Guerino Vanoli Basket | Lega Basket Serie A | Cremona | 1999 | Palasport Mario Radi |