In 2010, Gay helped the United States win its first FIBA World Championship gold medal since 1994, averaging 7.0 points, 2.9 rebounds and 1.0 steals in 13.4 minutes in nine games for the undefeated Americans. He was also a member of the national team in 2014 that collected the gold medal at the FIBA Basketball World Cup after another undefeated campaign.