| Band | Formed / started | Split up / ended | Note |
|---|---|---|---|
| G//Z/R | 1995 | — | — |
| Galahad | July 1985 | — | English prog band |
| Galahad Acoustic Quintet | 1994 | 1994 | — |
| Gallagher & Lyle | 1967 | 1979 | — |
| Galliano | 1988 | — | — |
| Gallon Drunk | 1988 | — | punk blues, noise rock, garage rock, rockabilly, UK |
| Gandalf’s Fist | 2005 | — | — |
| Gang of Four | 1977 | — | English post‐punk band |
| Garden of Eyes | 2018 | — | — |
| Gash | 1997 | — | — |
| Gaskin | March 1980 | — | — |
| Gass | 1965 | 1971 | — |
| Gay Dad | 1998 | 2002 | — |
| GBH | 1980 | — | — |
| Geisha Girls | 1979 | — | — |
| Gene | 1993 | 16 December 2004 | — |
| Gene Loves Jezebel | 1980 | — | — |
| General Chaos | January 2016 | — | — |
| Generation X | 21 November 1976 | February 1981 | — |
| Generic | 1985 | 1989 | — |
| Genesis | 1967 | 26 March 2022 | English rock band |
| Geneva | 1992 | 2000 | — |
| Gengahr | 1 October 2013 | — | — |
| Genital Deformities | 1987 | — | — |
| Gentle Giant | February 1970 | 1980 | — |
| Gentlemans Pistols | 2003 | — | — |
| Geomancer | 2013 | — | — |
| Geordie | 1972 | — | British glam rock/hard rock band |
| Gerry and the Pacemakers | 1959 | — | — |
| Ghast | 2007 | 2014 | — |
| Ghost Dance | 1985 | 1989 | 80s UK goth band |
| Ghouls | 31 October 2011 | — | — |
| Ghül | 2023 | — | — |
| Giles, Giles & Fripp | 28 August 1967 | 13 January 1969 | — |
| Gilgamesh | 1972 | 1978 | — |
| Gillan | July 1978 | December 1982 | — |
| Ginger Baker’s Air Force | 1969 | 1970 | — |
| Girl | 1979 | 1982 | UK rock band |
| Girls Aloud | December 2002 | — | — |
| Girlschool | 1978 | — | — |
| Githead | 30 January 2004 | — | — |
| Glam Sparrow | November 2009 | — | — |
| Glamour of the Kill | 2007 | 2015 | — |
| Glass Animals | 1 January 2010 | — | — |
| Glassbooks | 1 February 2012 | — | — |
| GlassHeads | 1 November 2009 | — | — |
| Glasvegas | 2005 | — | — |
| Glemt | 2019 | — | — |
| Gnarwolves | 2011 | July 2018 | — |
| Gnidrolog | 1969 | 1999 | — |
| Go West | 1982 | — | — |
| Goat Girl | 2016 | — | — |
| Gobblinz | 1975 | 1979 | — |
| God | 1987 | 1996 | — |
| God Damn | June 2010 | — | British heavy metal band |
| Godflesh | 1988 | — | — |
| Godley & Creme | 1977 | 1988 | — |
| Godsticks | 2006 | — | — |
| Godthrymm | 2017 | — | — |
| GoGo Penguin | 2009 | — | — |
| Goldblade | 1994 | — | — |
| Golden Silvers | 2007 | 2011 | — |
| Golden Tanks | 1 September 2009 | — | — |
| Goldfrapp | 1999 | — | — |
| Goldie Lookin Chain | 2000 | — | Welsh comedic rap group |
| Goldrush | 1999 | — | — |
| Gomez | 1996 | — | UK indie rock band |
| Gomorrah | 1990 | — | — |
| Good Neighbours | 2023 | — | — |
| Good Sad Happy Bad | 2008 | — | — |
| Good Shoes | 2005 | — | — |
| Good Weather for an Airstrike | 2009 | — | — |
| Goodtime Boys | 2009 | 2015 | — |
| Goonies Never Say Die | August 2007 | — | — |
| Gore Sanctum | 2008 | — | — |
| Gorebringer | 2017 | — | — |
| Goreopsy | 1996 | — | — |
| Gorerotted | 1997 | April 2008 | — |
| Gorgon Vomit | 2022 | — | — |
| Gorilla | 1998 | — | — |
| Gorilla Riot | 2014 | — | — |
| Gorky’s Zygotic Mynci | 1991 | 26 May 2006 | — |
| Goya Dress | 1993 | 1997 | — |
| GPS | June 2006 | 2008 | — |
| Graham Parker & The Rumour | 1976 | 1982 | — |
| Grammatics | 2006 | 2010 | — |
| Grand Drive | 1997 | — | — |
| Grave Lines | 2015 | — | — |
| Gravedale High | 2006 | — | — |
| Gravenhurst | 1999 | 2 December 2014 | — |
| Gravy Train | 1970 | 1974 | — |
| Great British Heroes | 1976 | — | — |
| Green Lung | 2017 | — | — |
| Greenslade | November 1972 | January 1976 | — |
| Greyhaven | 2015 | 2018 | — |
| Grim Reaper | 1979 | — | — |
| Grinderman | 2006 | 11 December 2011 | — |
| Grinn | 2024 | — | — |
| Grooving in Green | 2008 | — | — |
| Groundbreaker | 2018 | — | Melodic hard rock band |
| Grumbling Fur | 2011 | — | — |
| Gryphon | 1973 | 1977 | — |
| GTR | 1984 | 1987 | — |
| Guana Batz | 1983 | — | — |
| Guapo | 1994 | — | — |
| Gudjohr | 9 June 2012 | — | — |
| Guillemots | November 2004 | — | — |
| Guitar Gangsters | 1988 | — | — |
| Guiye Frayo | 2007 | — | — |
| Gum Takes Tooth | 2009 | — | — |
| Guns ’n’ Wankers | 1991 | 1994 | — |
| Gunslinger | 1979 | — | — |
| Gypsy Pistoleros | 2005 | — | — |
| Gyro | 1975 | — | — |
| Gévaudan | 6 June 2013 | — | — |