| Gordian Warrior | October 7, 1979 | TV Tokyo | 73 |
| Gormiti | October 1, 2018 | — | 52 |
| Gormiti: The Lords Of Nature Return! | October 27, 2008 | Italia 1 | 65 |
| GoShogun | July 3, 1981 | TV Tokyo | 26 |
| Gosick | January 7, 2011 | — | 24 |
| Gotham Girls | July 27, 2000 | — | 31 |
| Goulart Knights | — | — | — |
| Gourmet Girl Graffiti | January 9, 2015 | — | 12 |
| Gowappa 5 Gōdam | April 4, 1976 | TV Asahi | 36 |
| GR: Giant Robo | January 19, 2007 | — | — |
| Grabbit the Rabbit | 1999 | Channel 1 | 13 |
| Grabouillon | October 23, 2006 | France 5 | 208 |
| Gran | November 17, 1982 | British Broadcasting Corporation | 13 |
| Granbelm | July 5, 2019 | — | 13 |
| Granblue Fantasy The Animation | January 21, 2017 | — | — |
| Grand Blue | July 14, 2018 | MBS | 36 |
| Grand Blues! | October 8, 2020 | — | 12 |
| Grander Musashi | April 2, 1997 | TV Tokyo | 64 |
| Grandpa and Grandma Turn Young Again | April 7, 2024 | — | 11 |
| Grandpa Danger | April 4, 2004 | TV Tokyo | 51 |
| Gravedale High | September 8, 1990 | NBC | 13 |
| Graveyard Kitaro | 2008 | — | — |
| Gravion | October 7, 2002 | — | 25 |
| Gravitation | October 4, 2000 | WOWOW | 13 |
| Gravity Falls | June 15, 2012 | Disney Channel, Disney XD | 40 |
| Great Dangaioh | April 5, 2001 | — | 13 |
| Great Mazinger | September 8, 1974 | Fuji Television | 56 |
| Great Pretender | June 2, 2020 | Netflix | 23 |
| Great Teacher Onizuka | June 30, 1999 | Fuji Television | 43 |
| Greatest Party Story Ever | January 14, 2016 | MTV | 10 |
| Green Eggs and Ham | November 8, 2019 | Netflix | 23 |
| Green Green | July 12, 2003 | — | 12 |
| Green Lantern: The Animated Series | November 11, 2011 | Cartoon Network | 26 |
| Green Legend Ran | November 25, 1992 | — | 3 |
| Gregory Horror Show | October 1, 1999 | — | — |
| Gremlins: Secrets of the Mogwai | May 23, 2023 | Cinemax, HBO Max | 10 |
| Grenadier: The Senshi of Smiles | October 15, 2004 | WOWOW | 12 |
| Grenadine & Peppermint | 2010 | — | 78 |
| Grendizer | October 5, 1975 | Fuji Television | 74 |
| Grendizer U | July 5, 2024 | — | 13 |
| Grim & Evil | August 24, 2001 | Cartoon Network | 13 |
| Grimgar of Fantasy and Ash | January 11, 2016 | Tokyo MX | 12 |
| Grimm's Fairy Tale Classics | October 21, 1987 | TV Asahi | — |
| Grimms Notes: The Animation | January 10, 2019 | — | 12 |
| Grimoire of Zero | April 10, 2017 | — | 12 |
| Grimsburg | January 7, 2024 | Fox Broadcasting Company | 19 |
| Grisaia: Phantom Trigger | January 2, 2025 | — | — |
| Grizzly Tales for Gruesome Kids | January 4, 2000 | Nicktoons, ITV | 105 |
| Grizzy and the Lemmings | October 10, 2016 | Boomerang | 312 |
| Groizer X | July 1, 1976 | — | 36 |
| Grojband | June 10, 2013 | Télétoon, Cartoon Network | 26 |
| Groovie Goolies | September 12, 1970 | CBS | 16 |
| Ground Control to Psychoelectric Girl | April 15, 2011 | — | 12 |
| Ground Defense Force! Mao-chan | July 3, 2002 | — | 26 |
| Grow Up Show | July 5, 2026 | — | 13 |
| Growing Up Creepie | September 9, 2006 | Discovery Family, YTV | 26 |
| Growing Up with Tiantian | — | — | 26 |
| Gu Gu Ganmo | March 18, 1984 | — | 50 |
| GuAn | — | — | — |
| Guardian Fairy Michel | — | — | — |