- Gypsy
- Gryphon
- Groucho
- Gomez
- Gonzo
- Gemma
- Gammeron
- Gabrielle
- Ghertie Mae
- Guns
- Gracie (Grace)
- Gyver
- Gremlin
- Gidget
- Giester
- Ginrummy
- Grunge
- Georgie
- Glory Halluah Baillings (LuLu)
- Girlfriend
- Giggles
- Gambit
- Gaspe (gas-pay)
- Glenn
- Gordito
- Gabby
- Gami
- Gamora
- Garfunkle
- Goosebump
- Gabbers
- Goober
- Genesis
- Gummie
- Gunny
- Granny
- Goofy
- Gilligan
- Ginger
- Gavalon
- George
- Gravy
- Gholam
- Greta
- Giddie (Giddy)
- Gizzy
- Gavin
- Grey
- Gorgan
- Gex
- Gejo
- Golden
- Goliath
- Gigi
- Gilby
- Gogue
- Gompy
- Growlithe
- Gus
- Geo
- Gina
- Gadget
- Garfield
- Gretchen
- Glory
- Gato
- Gatsby
- Gorgy (gorgeous)
- Gizmo
- Gordy
- Green Goddess
- Grisabella
- GiGi
- Goof Ball
- Gizgog
- Green Bean
- Googles
- Gunther
- Godiva
- Gumbo
- Gustav
- Garp
- Gatita
- Georgetta
- Gertrude
- Ghostdance
- Garland
Great G Names For Your Cat
