- Gallagher, Rory: TheSmi at MTS
- Gandolfini, James: Silus at MTS (as Tony Soprano from The Sopranos)
- Garbo, Greta: Jessica at Wicked Sims, ~Jessica~ at MTS
- Garcia, Jorge: paperbackwriter at MTS (as Hugo 'Hurley' Reyes from LOST)
- Garland, Judy: Jessica at Wicked Sims
- Garner, Jennifer:
- Galecki, Johnny: simgirl675 The Sims Resource
- Gates, Synyster: Nymphy at MTS (of AvengedSevenfold)
- Gellar, Sarah Michelle: buffybot at InSIM (as Buffy Summers from Buffy the Vampire Slayer)@stefan at MTS
- Gere, Richard Vera Marina at MTS
- Gibson, Mel: LORDK at MTS
- Goldberg, Whoopi: bakalia at MTS
- Gore, Martin L: HystericalParoxysm at MTS (of Depeche Mode)
- Gosling, Ryan: escand at MTS
- Griffin, Kathy: Wicked poppies at MTS
- Gunther: tribillio at InSIM
- Gyllenhaal, Jake:
- fanseelamb at MTS (as Jack Twist from Brokeback Mountain)
- UdontKnow at MTS