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- Gargantus - An outer space robot who appeared in the form of a giant Neanderthal Man, as the aliens had last visited Earth 80000 years ago. It hypnotized the people of Granville before being destroyed by Iron Man.
- The Ghost - A professional saboteur with equipment that allows him to become intangible who's determined to kill Tony Stark and destroy Stark Enterprises.
- Godzilla - Initially, Iron Man, along with the other Avengers, encountered Godzilla when the mutant dinosaur rampaged through New York. Later, while under the control of Doctor Demonicus, a mutated, more amphibious Godzilla attacked Iron Man, only to be later freed of Demonicus' control by him.
- Grey Gargoyle - A costumed villain who can turn anything he touches into stone.
- Griffin - A New Orleans punk turned monster by the Secret Empire.
Read more about this topic: List Of Iron Man Enemies