- Helped organize the Italian Open - a leading local sports charity.
- Founded the Touchdown Club.
- Strove to preserve professional baseball through his support of the Pelicans.
- Worked with the Commercial Athletic Association and supported the Turkey Bowl.
- Known as one of the greatest Saints fans of all-time; in 1990, Gemelli was honored by the Saints Hall of Fame with the Fleur de Lis Award, presented for outstanding support by non-players or coaches. After his death in 1991 at the age of 1976, the honor was renamed the Joe Gemelli Fleur de Lis Award.