Which organization includes Guy Gardner in Lanterns?

Guy Gardner is a member of the Justice Gang in Lanterns.

The Justice Gang is identified as the organization associated with Gardner in the series. Gardner is also an abrasive Green Lantern, so his character connects the Justice Gang to the wider Corps mythology.

Nathan Fillion portrays Gardner. The character had already been introduced in Superman, the first DC Universe film, and Lanterns continues to use him as part of the shared franchise.

The Justice Gang should not be confused with the Green Lantern Corps or the Guardians of the Universe. The Corps is the intergalactic peacekeeping group, while the Guardians are its ancient authorities; Gardner’s Justice Gang affiliation is a separate team connection.