In 1981, Gasnier was selected as one of the initial four post-war "Immortals" of the Australian game along with Clive Churchill, Johnny Raper and Bob Fulton. In December of that year, he was inducted into the Sport Australia Hall of Fame and in 2002, he was inducted into the Australian Rugby League Hall of Fame. He was appointed a Member of the Order of Australia (AM) in 1989. He was awarded the Australian Sports Medal in 2000, and the Centenary Medal in 2001.