The Gand sector was a region of space in the Delta Quadrant, that contained a Kazon colony. The Borg encountered the colony, but deemed it unworthy of assimilation.

The Gand sector was located in the Borg designated Grid 6920. (VOY: "Mortal Coil")

This sector was only mentioned in dialogue.
The Gand sector was named by Bryan Fuller. He took the name "Gand" from an alien species in Star Wars. (Information from Larry Nemecek)
According to the Star Trek: Star Charts (p. 86), the Gand system was a binary system with a pair of M-class stars. This system was near space claimed by the Kazon-Nistrim.