Gallo, a three-time NCAA Championship qualifier, captured the 126-pound national championship and was named the NCAA Championship's Most Outstanding Wrestler in 1977. He earned All-America honors in 1975, by placing fourth and 1977 with the national title. During his four years at Hofstra Gallo recorded a 104-14 record. He was a silver medalist in the 1980 World Cup, Pan American Trials Champion in 1979, and a member of the 1976 and 1980 Olympic Freestyle Wrestling Teams.
In 1979, Gallo returned to Hofstra as the head wrestling coach and proceeded to record a 49-25-0 record over the next four years including East Coast Conference championships in 1980, 1982 and 1983. In his final year as coach Gallo led the Pride to a 13-3 mark, captured their third ECC title, sent five wrestlers to the NCAA Championships and finished 24th in the country.