His first appointment to the bench was as a Judge of the High Court in 1987, followed three years later by being made a member of the Court of Appeal. He was appointed President of the Court of Appeal in May 2002.
A keen golfer, Gault won the New Zealand Universities’ Championship, and was awarded Blues by both Victoria University and the University of New Zealand. Moving into the administration of the game, he was President of the New Zealand Golf Association from 1987 to 1996 and as an Advisory Member of the Rules of Golf and Amateur Status Committees from 1978 to 1996. He was referee for The Open Championship from 1993 to 1998. He joined The Royal and Ancient Golf Club of St Andrews in 1994, and was made its first New Zealand captain in September 2005.