Garry "Gaz" Jennings is an English musician best known for his work as the guitarist for doom metal band Cathedral.

[5][6][7][8] Jennings formed Acid Reign in 1985, along with Howard "H" Smith, Kevin "Kev" Papworth, Ian Gangwer and Mark Ramsey Wharton,[9] while attending Harrogate High School (then-called "Granby").

[11] Then in 1989, Jennings was contacted by ex-Napalm Death vocalist Lee Dorian with the proposition of forming a band together, which would end up becoming Cathedral, and would also include then-Acid Reign guitarist Adam Lehan.

[9] In 1994, Jennings would briefly form a band called Septic Tank with Lee Dorrian, Repulsion vocalist and bassist Scott Carlson and Trouble drummer Barry Stern.

[12] Cathedral would announce their breakup shortly after the release of their 2013 album The Last Spire,[13] leading to Jennings reforming Septic Tank, this time with Jaime "Gomez" Arellano, due to Barry Stern's death in 2005.