GAIRAH
FIRST APPEARANCE: WAR OF THE GARGANTUAS (Toho movie)

GANIME
FIRST APPEARANCE: YOG, MONSTER FROM SPACE (Toho movie)

GAROBUG (ZONE FIGHTER)

GEKIDO-JIN
FIRST APPEARANCE: GODZILLA COLOR SPECIAL #1 (Dark Horse comic)

GEZORA
FIRST APPEARANCE: YOG, MONSTER FROM SPACE (Toho movie)

GHIDORAH
Also referred to as KING GHIDORAH, this three-headed dragon (either from space or from time, depending on the continuity) is a feared force of destruction
FIRST APPEARANCE: GHIDRAH, THE THREE-HEADED MONSTER (Toho movie)

GHILARON

GIANT ARMADILLONEW!

GIANT BATNEW!

GIANT CONDOR
FIRST APPEARANCE: GODZILLA VS. THE SEA MONSTER (Toho movie)

GIANT FLYNEW!
FIRST APPEARANCE: GODZILLA: "MICROGODZILLA" (Hanna-Barbera cartoon)

GIANT CRABNEW!
FIRST APPEARANCE: GODZILLA: "THE MACRO BEASTS" (Hanna-Barbera cartoon)

GIANT FUNGUSNEW!

GIANT HUMMINGBIRDSNEW!

GIANT JELLYFISHNEW!

GIANT MANTA RAY INEW!
FIRST APPEARANCE: GODZILLA: "THE MACRO BEASTS" (Hanna-Barbera cartoon)

GIANT MANTA RAY IINEW!

GIANT MILLIPEDENEW!

GIANT OCTOPUS
This giant molusk first appeared on the same island as KING KONG, and was quickly defeated by the simian god. Either this, or another of its kind, appeared years later to attack FRANKENSTEIN, perhaps mistaking him for the similar humanoid KONG. The "offspring" of FRANKENSTEIN, GAIRAH was spotted in battle with this creature sometime shortly after.
FIRST APPEARANCE: KING KONG VS. GODZILLA (Toho movie)

GIANT OCTOPUS IINEW!
FIRST APPEARANCE: GODZILLA: "GHOST SHIP" (Hanna-Barbera cartoon)

GIANT SALAMANDERNEW!

GIANT SCORPIONSNEW!

GIANT SEA ANEMONE (TS) – never actually shown?

GIANT SEA SNAKE
FIRST APPEARANCE: KING KONG ESCAPES (Toho movie)

GIANT SPIDER (HB)

GIANT SQUID INEW!
FIRST APPEARANCE: GODZILLA: "CALICO CLONES" (Hanna-Barbera cartoon)

GIANT SQUID II
When CRUSTACEOUS REX emerges from its sea home, it scares this race of monstrous mollusks to the surface, where they are quickly disposed of by GODZILLA VI

GIANT TERMITESNEW!

GIANT TURTLENEW!

GIANT VAMPIRE BAT (TS) – never actually shown?

GIANT WATER BEETLENEW!

GIGAMOTH
This monstrous creature was intended as an evil version of Mothra for an aborted film
FIRST APPEARANCE: GODZILLA VS. GIGAMOTH (Toho script [unused])

GIGAN
A cybord monster from Star Hunter M, this vicious monster has threatened the Earth numerous times, and has been repulsed most often by GODZILLA
FIRST APPEARANCE: GODZILLA VS. GIGAN (Toho movie)

GIMANTES
A by-product of scientific tampering on a remote Pacific Island, these creatures tried to dine on the newborn MINYA
FIRST APPEARANCE: SON OF GODZILLA (Toho movie)

GODZILLA I
The original creature to be labeled GODZILLA, this monster was killed by the Oxygen Destroyer.
FIRST APPEARANCE: GODZILLA, KING OF THE MONSTERS (Toho movie)

GODZILLA II
In at least one reality, another GODZILLA creature emerged, and eventually became the greatest defender earth had against other monsters and invading aliens.
FIRST APPEARANCE: GODZILLA RAIDS AGAIN (Toho movie)

GODZILLA III
The origins of this GODZILLA are unknown, as are the conditions under which it became allied with, and under the control of the crew of the Calico

GODZILLA IV
FIRST APPEARANCE: GODZILLA, KING OF THE MONSTERS #1 (Marvel comic)

GODZILLA IVa
Years after GODZILLA IV disappeared, his old enemy Doctor Demonicus revealed to have in his possession an enormous kaiju. His veiled references to it as being "my old enemy" have led many to believe that this creature is, in fact, GODZILLA IV, mutated beyond recognition.
FIRST APPEARANCE: (in mutated form) IRON MAN #193 (Marvel comic)

GODZILLA V
In one reality, another this GODZILLA emerged 30 years after the death of the original. His creation may or may not be due to the tampering of invaders from the future.
FIRST APPEARANCE: GODZILLA 1985 (Toho movie)

GODZILLA VI
This GODZILLA was not created by nuclear radiation, but is rather one of the legendary "DISASTER MONSTERS." Originally made its first appearance against mankind while seeking the call of an ancient stone tablet that had recently been uncovered.
FIRST APPEARANCE: GODZILLA, KING OF THE MONSTERS SPECIAL #1 (Dark Horse comic)

GODZILLA VII
This is GODZILLA JR., who, during a battle with DESTOROYAH, consumed a massive amount of radioactivity and mutated more, resembling the now-deceased GODZILLA V.
FIRST APPEARANCE: (as GODZILLA VII) GODZILLA VS. DESTOROYAH (Toho movie)

GODZILLA VIII
Apparently the bi-product of French nuclear testing, this GODZILLA did massive damage to New York before being destroyed. Was later revived as CYBER- GODZILLA
FIRST APPEARANCE: GODZILLA (Tristar movie)

GODZILLA IX
The offspring of GODZILLA VIII, this lone survivor of the nest became the "pet" of a group of scientists intent on learning its nature

GODZILLA X
In yet another reality, this creature emerged after the death of GODZILLA I.
FIRST APPEARANCE: GODZILLA 2000 (Toho movie)

GODZILLA JR
Formerly LITTLE GODZILLA
FIRST APPEARANCE: (as GODZILLA JR) GODZILLA VS. DESTOROYAH (Toho movie)

GODZILLASAURUS
The lone surviving dinosaur, discovered on a Pacific island during WWII. Was hidden by future invaders, but irradiated with nuclear energy, became GODZILLA
FIRST APPEARANCE: GODZILLA VS. KING GHIDORAH (Toho movie)

GODZOOKY
This monster was theorized to be related to GODZILLA II. He partook in adventures along with that GODZILLA's human companions

GOLDEN GUARDIANSNEW!
FIRST APPEARANCE: GODZILLA: "THE GOLDEN GUARDIANS" (Hanna-Barbera cartoon)

GOROSAURUS
Large dinosaur discovered on the same Pacific island as KING KONG. Was captured and imprisoned on Monster Island

GREAT WATCHUKANEW!
FIRST APPEARANCE: GODZILLA: "THE SUB-ZERO TERROR" (Hanna-Barbera cartoon)

GRYPHONNEW!

GUS THE SPIDERNEW!