G.U.N. (disambiguation)

G.U.N. may refer to:
 * Guardian Units of Nations, the group in the Sonic the Hedgehog series video games.
 * Guardian Units of the Nation, the group in the Sonic the Hedgehog comic series and its spin-off published by Archie Comics.
 * Guardian Units of the Nation (Pre-Super Genesis Wave), the version of G.U.N. before the Super Genesis Wave.
 * Guardian Units of the Nation, the group in the anime series Sonic X and its comic series.
 * Guardian Units of the Nation (Dark Mobius), the version G.U.N. from Dark Mobius.