| Future Fantastic | British Broadcasting Corporation | documentary television series | 1 | 9 |
| Future Generations | — | — | — | — |
| G Force | — | — | — | — |
| G'wed | — | — | — | — |
| G.B.H. | — | — | 1 | 7 |
| G@mers | Rapture TV, Information TV | — | — | — |
| Gadget Man | Channel 4 | — | 4 | 25 |
| Gadzooks! | — | — | — | — |
| Galapagos 3D | Sky 3D | documentary television program, nature documentary, documentary film | 1 | 3 |
| Galidor: Defenders of the Outer Dimension | YTV | science fiction television series | 2 | 26 |
| Galloping Galaxies! | — | — | 2 | 10 |
| Gallowglass | BBC One | — | 1 | 3 |
| Galápagos | BBC Two | nature documentary | — | 3 |
| Gambit | ITV | game show | 11 | 141 |
| Game for a Laugh | ITV, Das Erste | game show | 5 | 60 |
| Game of Wool: Britain's Best Knitter | — | — | — | — |
| Game On | BBC Two | sitcom | 3 | 18 |
| Game, Set and Match | ITV | drama television series | 1 | 13 |
| Game60 | XLEAGUE.TV | — | — | — |
| GameFace | Channel 4 | comedy drama | 2 | 12 |
| Gamepad | Bravo | — | 4 | — |
| Gamer.tv | — | — | — | 283 |
| Games Night | XLEAGUE.TV | — | — | — |
| Games Republic | .tv | game show | — | — |
| Games World | Sky One | — | 4 | — |
| GamesMaster | Channel 4 | — | 7 | 126 |
| Gamezville | — | — | 2 | 192 |
| Ganges | BBC Two | nature documentary | — | 3 |
| Gangs of London | Sky Atlantic, AMC+ | action television series, crime television series, drama television series | 3 | 25 |
| Gangsters | BBC One | — | 2 | 12 |
| Garden Rescue | BBC One | makeover reality television series | 8 | 255 |
| Gardeners' World | British Broadcasting Corporation | gardening television series | — | — |
| Garrow's Law | BBC One | drama television series | 3 | 12 |
| Garry Halliday | BBC One | — | — | 50 |
| Garth Marenghi's Darkplace | Channel 4 | sitcom, science fiction television series | 1 | 6 |
| Gary: Tank Commander | — | sitcom | 3 | 18 |
| Gash | — | — | — | — |
| Gaslight Theatre | — | — | — | — |
| Gastank | — | — | — | — |
| Gates | — | sitcom | 1 | 5 |
| Gavin & Stacey | BBC Three | sitcom | 3 | 20 |
| Gay Life | — | LGBT-related television series | — | — |
| Gaytime TV | BBC Two | LGBT-related television series | 4 | 29 |
| Gears and Tears | — | documentary film | 1 | 6 |
| Gecko's Garage | — | — | — | — |
| Gemma Collins: Diva | — | — | — | — |
| Gemma Collins: Diva Forever | — | — | — | — |
| Gemma Collins: Diva on Lockdown | — | — | — | — |
| Gems | — | — | — | 121 |
| General Hospital | ITV | soap opera | 6 | — |
| Generation Gifted | — | — | — | — |
| Generation Z | Channel 4 | — | — | 6 |
| Genie in the House | Nickelodeon | sitcom | 4 | 78 |
| Genius | BBC Two | comedy television series | 2 | 12 |
| Genius of Britain | — | documentary film, documentary television program | 1 | 5 |
| Gentleman Jack | BBC One, HBO | period drama film, LGBT-related television series, historical fiction | 2 | 16 |
| Gentlemen and Players | ITV | — | 2 | 13 |
| Geordie Racer | — | — | — | 10 |
| Geordie Shore OGs | — | — | — | — |
| George and Mildred | ITV | sitcom | 5 | 38 |