George McGrath was the son of a Camberwell post office worker who died when George was just five. McGrath first played hockey for Wimbledon in 1912 and went on to become a stalwart of the club. He was responsible for reviving the club after World War One when he assumed the posts of Honorary Secretary (which he held for 11 years) and Honorary Treasurer. At the same time was captain of the first XI, which he skippered for four years. He also served as a lieutenant at the Royal School of Artillery. His former experience as an assistant secretary for the National Association for the Employment of ex-Soldiers and then as secretary of the Wimbledon Park Golf Club were good schooling for his administrative capacities at Wimbledon Hockey Club.
An inside-forward he won representative honours for Surrey and the South but despite playing for Great Britain at the 1920 Olympic Games he never won an England cap. McGrath later became a writer and broadcaster.