Gamma Meridien was a star system, located somewhere in the space of the galaxy's Alpha or Beta Quadrants. Tamieron the Tinkerer owned a moon in the Gamma Meridien system where he collected derelict starships from around the galaxy. (TNG comic: "The Lesson")

The stellar notation using the Greek language letter "gamma" indicates that there might be a star group or constellation of some sort named "Meridien", of which Gamma Meridien would logically be indicated to be the third most prominent star or system.