Gary Mathieu Groh (born October 11, 1944) is an American professional golfer who played on the PGA Tour in the 1970s. Groh was born in Chicago, Illinois. He attended Michigan State University and turned pro in 1968. Groh played on the PGA Tour from 1971 to 1978 and won one event. His career year was 1975 when he won the Hawaiian Open, earned $68,296 and finished 31st on the money list. His best finish in a major championship was T18 at the U.S. Open in 1975.