Gamba was a finalist for induction into the Naismith Memorial Basketball Hall of Fame in 2005, and was elected as a member in 2006.

Gamba debuted with the Italy national team in 1952 and captained at the 1960 Summer Olympic Games.

He led Varese to two LBA championships (1974 and 1977), and two FIBA European Champions Cup (EuroLeague) titles (1975 and 1976).

From 1979 to 1992, except for a hiatus in 1985–1987, Gamba was the head coach of the Italy national team, and led them to a silver medal at the Summer Olympic Games in 1980, 1984, 1988, and 1992.

He also coached the national team at the EuroBasket seven times, winning a gold in 1983, a bronze in 1985, and a silver in 1991.