Giarrusso created the Mini Marvels comic strips, featuring Marvel superheroes as children, which have appeared as back up features in many Marvel comics. The various strips were collected into Rock, Paper, Scissors and then featured in Mini Marvels: Secret Invasion.
Giarrusso also created G-Man and an all-new cast of kid superhero characters in the Comic Bits comic strip first published by Image Comics in the pages of the Savage Dragon comic series. The first G-Man digest collection, G-Man vol. 1: Learning to Fly, was released in May 2009. The first full G-Man mini-series, G-Man: Cape Crisis, is a five-issue monthly mini series that began publication in August 2009.