| Gaia |
| Galactus |
| Gambit |
| Gambit (films) |
| Gamora |
| Le Gantelet |
| Gargouille |
| Garokk |
| Garrett, Jeffrey |
| Gateway |
| Gauntlet II |
| Gauntlet III |
| Gaza |
| Gazer |
| Gée |
| Geiger |
| Geldoff |
| Gémeaux III |
| Genesis |
| Gentle |
| Ghazikhanian, Annie |
| Giant-Man I |
| Giant-Man III |
| Giant-Woman |
| Gidéon |
| Gilgamesh |
| Gin Genie |
| Giroflée |
| Gladiator II |
| Gladiatrix |
| Glenn, Heather |
| Glob Herman |
| Gloom |
| Gloriana |
| Glow Worm |
| Go-Go Tomago |
| Golddigger |
| Goliath I |
| Goliath II |
| Goliath IV |
| Gorgone I |
| Gorilla Girl |
| Gosamyr |
| Goudron |
| La Goule II |
| Grasshopper I |
| Graymalkin |
| Grey-Bailey, Sara |
| Grey, Elaine |
| Grey, Jean |
| Grey, Jean (films) |
| Grey, John |
| Greystone |
| Grizzly IV |
| Groonk |
| Gros Cobra |
| Guardian I |
| Guardian II |
| Guardian VI |
| La Guêpe I |
| La Guêpe II |
| Le Guérisseur |
| Guerre II |
| Guerre III |
| Guerre IV |
| Guerre V |
| La Guerrière |
| Gueule d'Or |
| Gunderson, Milo |
| Guthrie, Cissie |
| Guthrie, Elizabeth |
| Guthrie, Jebediah |
| Guthrie, Joelle |
| Guthrie, Lewis |
| Guthrie, Lucas |
| Guthrie, Lucinda |
| Guthrie, Raymond Jr. |
| Guthrie, Thomas Zebulon |
| Gyrich, Henry |