For the similarly named system or outpost, please see Gamma 7A system or Gamma 7 outpost.
Gamma 7 sector was a spatial region that was located somewhere in the Alpha or Beta Quadrant. This sector contained the Federation planet Gagarin IV and an unnamed outpost. This sector was adjacent to an unnamed sector, which was home to Star Station India.
In 2365, the USS Lantree was assigned to the Gamma 7 sector, when her entire crew fell victim to a mysterious disease. (TNG: "Unnatural Selection")
In the episode's script, the Lantree was assigned to Gamma seven seven. For the filmed episode, the second "seven" was changed to "sector".