G

Galvatron,

Decepticon leader. In Transformers-the movie the badly injured Megatron was rebuilt into Galvatron by Unicron.

G.B. Blackrock,

This multimillionair is a close friend of the Autobots in the comic books.

Gearhead,

Autobot from the second generation. Transforms into a car. He is one of the Gobots.

Gears,

Autobot. Transforms into a car. He is one of the Mini-Vehicles.

Gestalts,

Gestalts are Transformers that exist out of a few different Transformers that have combined to form the Gestalt. The names of the Gestalts are:
Abominus
Bruticus
Computron
Defensor
Devastator
Menasor
Piranacon
Predaking
Superion

Getaway,

Autobot. Transforms into a car. Rev transforms into his engine. He is one of the Powermasters.

Gnaw,

Decepticon. In the series the Quintessons have a large group of identical robots, all resembling Gnaw. The name Gnaw doesn't appear in the series. The group is called the Sharkticons.

Gobots,

Group of Transformers from the second generation. Their names are:
Blowout
Bumblebee
Double Clutch
Firecracker
Frenzy
Gearhead
Highbeam
Ironhide
Megatron
Mirage
Motormouth
Optimus Prime
Sideswipe
Soundwave

Goldbug,

Autobot. Transforms into a car. His original name was Bumblebee. In The Return Of Optimus Prime, part 2 Bumblebee was rebuilt into Goldbug. He is one of the Throttlebots.

Gort,

Nebulon. Transforms into Highbrows head.

Grand Slam,

Autobot. Transforms from cassette into a tank. Together with Raindance he forms a robot: Slamdance. He is one of the Mini-Cassettes.

Grapple,

Autobot. Transforms into a construction vehicle. He is one of the Autobot Vehicles.

Grax,

Nebulon. Transforms into Skullcrunchers head.

Greasepit,

Decepticon Micromaster. Transforms into a buggy. The base of Greasepit transforms into a garage. He is one of the Micromaster Battlestations.

Greaser,

Autobot micromaster. Transforms into a car. He is a member of the Hot Rod Patrol.

Grimlock,

Autobot Actionmaster. His weapon transforms into some sort of service droid.

Grimlock,

Autobot. Transforms into a Tyrannosaurus Rex. He was created by Wheeljack in S.O.S. Dinobots. He is the leader of the Dinobots.

Grimlock,

Autobot. Transforms into a Tyrannosaurus Rex. He is one of the Pretender Classics.

Grimlock,

Autobot from the second generation. Second release of Grimlock. His main colour is in this version blue instead of grey.

Grimlock,

Maximal. Comes from the Beast Wars. Transforms into a velociraptor, this is in fact a second release of Dinobot, but in different colors.

Gripper,

Autobot. Transforms into a race car. He is one of the Motorvators.

Grit,

Decepticon Micromaster. Transforms together with Knockout into a construction vehicle. He is a member of the Constructor Squad.

Groove,

Autobot. Transforms into a motorcycle. He is one of the Protectobots.

Groove,

Autobot from the second generation. Second release of Groove.

Grotusque,

Autobot. Transforms into a four legged monster. He is one of the Monsterbots.

Groundbreaker,

Autobot. Transforms into a car. He is one of the Pretenders.

Ground Hog,

Decepticon Micromaster. Transforms into car. He is a member of the Decepticon Race Track Patrol.

Groundpounder,

Autobot micromaster. Transforms into a construction vehicle. He is a member of the Autobot Construction Patrol.

Groundshaker,

Autobot Micromaster. Transforms into a jet. His base transforms into a tank. He is one of the Micromaster Bases.

Growl,

Decepticon micromaster. Transforms into a armoured car. He is a member of the Military Patrol.

Guardian Robots,

Very large Transformers, created to keep the cities on Cybertron safe. They were originally created by the Quintessons, but after the rebellion they served all the peaceful Transformer. The only one of them that has his own personality in the series is Omega Supreme.

Gunrunner,

Autobot. Transforms into a plane. He is a Pretender Vehicle.

Gusher,

Autobot Micromaster. Transforms together with Pipeline into a construction vehicle. Together they operate the Tanker Transport.

Gutcruncher,

Decepticon Actionmaster. His jet transforms into a tank and a attack vehicle.

Guzzle,

Autobot. Transforms into a tank. He was released for a second time, with different colors and a different name in the second generation. He is one of the Sparkabots.