While he was not successful as a head coach, Gibron was renowned for his colorful personality and immense appetite throughout his career. He weighed about 250 pounds during his playing career, but quickly ballooned to over 300 pounds as a coach. "Every time you went to dinner, it was a banquet", Browns teammate Lou Groza said of him. Buccaneer player Charley Hannah once said after dining with him, "He was eating things we wouldn't even go swimming with in Alabama". A humorous clip of Gibron singing Joy to the World on the sidelines during a 1973 game against Denver was made famous by NFL Films in "Football Follies". Gibron played himself in the critically acclaimed 1971 TV movie "Brian's Song", the story of Chicago Bears teammates Brian Piccolo and Gale Sayers.