Peter Warlow Gatehouse (born 3 May 1936) is a former Welsh cricketer.
Gatehouse was a right-handed batsman who bowled left-arm fast-medium.
He was born at Caerphilly, Glamorgan.
Gatehouse made his first-class debut for Glamorgan against Nottinghamshire at Stradey Park, Llanelli, in the 1957 County Championship.
He made eighteen further first-class appearances for the county, the last of which came against Kent at the St Lawrence Ground, Canterbury.
A bowler, Gatehouse took 53 wickets in his nineteen first-class matches, at an average of 29.26.
His best bowling figures of 7/94 came against Middlesex at Lord's in 1958.
He also took an additional three wickets in this match, giving him his only ten wicket match haul of his career.
He took a second five wicket haul against Somerset in the same season.
A tailend batsman, Gatehouse scored a total of 85 runs at a batting average of 5.66, with a high score of 20.While playing for Glamorgan, he studied at for a Ph.D.
in pharmacy at Cardiff University.
It was in this that he chose to pursue a career, thereby ending his first-class cricket career.