|Olympic medal record|
|Representing New Zealand|
|Men's field hockey|
|Montreal 1976||Team competition|
Gregory John Dayman (born 21 February 1945 in Wellington) is a former New Zealand field hockey player who was a member of the national team that won the molden medal at the 1976 Summer Olympics in Montreal.
Dayman made his debut for the Black Sticks in 1969 and was a regular feature for New Zealand over the next decade, participating as vice captain in the 1972 Munich Olympics where they finished 9th and going on to win gold at the 1976 Olympics in Montreal. He was named captain of the 1980 Olympic team, however New Zealand boycotted the games that year.