Internationally Gambucci played for the American national team at four World Championships.

Gambucci was signed as a free agent by the Montreal Canadiens in the spring of 1971 after scoring seven goals in ten games for Team USA at the 1971 world championships in Bern (he was also elected to the tournament all star team at the world championship "Pool B" qualifying tournament in 1970).

The Canadiens immediately traded him and Bob Paradise to the North Stars for cash.

Gambucci retired from professional hockey in 1976 after playing 112 WHA regular season games for the Fighting Saints as well as representing the United States at the 1976 World Championships in Katowice, Poland.

This biographical article relating to an American ice hockey center is a stub.