Gray Four was a callsign used by many pilots of the New Republic.

In 7 ABY, the Bothan Eurrsk Thri'ag was given the callsign during Wraith Squadron's training period on Folor Base. Lieutenant Atril Tabanne later used the callsign when she flew a TIE Fighter as part of Night Caller's Gray Flight during the Battle of Talasea. Shortly after, Wraith pilot Voort saBinring would use the same callsign when Wedge Antilles was replaced by Tabanne as Gray Leader prior to the Battle of Ession.