I do believe there must be more than one type of gold medal. Is it a secret.
Nigeria won the Gold medal in football at the 1996 Olmypics
The United States Women's Soccer team won the Gold medal at the 1996 Olympics
Kanu won the Men's Football gold medal at the 1996 Atlanta Olympics as a member of the Nigerian team that won the tournament.
Lee Lai Shan won a gold medal in sailing, in the board (mistral) event
None...the only medal Tonga has won was medal by Paea Wolfgramm in boxing in the 1996 olympics.
A link to all the gold medals won is below.