Gaia or Gaea, in comics, may refer to:
Gaia (Marvel Comics), a comic book character from Marvel Comics (an alien mutant and former member of Generation X)
Gaea, a comic book character from Marvel Comics (Goddess of the Earth)
Gaia (DC Comics), a character in Green Lantern comics
Gaea (DC Comics), a character in the DC Comics (Goddess of the Earth)
Gaia (Image Comics), a comic book character from Image Comics
Gaia Noble, a character in the comics series Noble Causes
My Gaia, a shōjo-ai manga comic by chuu
Gaia Records, a publishing company in the manga Nana