Jim Thorpe.
Thorpe won gold at the 1912 Games in Stockholm, played in the World Series with the New York Giants in 1917, and was elected to the Pro Football Hall of Fame in 1963.
Nigeria won the Gold medal in football at the 1996 Olmypics
Spain
Believe it or not, Brazil has never won Olympic Gold in football (aka soccer).
No. Through the 2008 Games in Beijing, India has not won any Olympic medals in football.
Great Britain
No, and Canadian football is not an Olympic Sport.
Nigeria in 1996 and Cameroon in 2000.
Argentina won the football gold medal at the 2008 Games in Beijing. Nigeria won silver and Brazil won bronze.
Cameroon. It was the first gold medal Cameroon had ever won at an Olympic Games.
Germany has won one gold medal.
The Australian National Football team has not won a medal in Olympic competition.
Men: Argentina Women: United States