The school's campus is relatively new as GHS moved to its current location in 1998 and the old campus became known as Gallup Junior High School, which housed 8th and 9th grade students from 1998 to 2008.

The Gallup High School attendance boundary after the split will be Gallup's westside and areas located west and north of town.

[2] For over 50 years, a partnership with the UNM Extension Division has brought students to Gallup High School for part-time instruction in college-level courses.

[3] In addition to portions of Gallup, it serves Crestview,[4] Defiance, Manuelito, Mentmore,[5] Purty Rock,[4] Rock Springs, Tse Bonito, and Ya-ta-hey,[5] as well as a small section of Catalpa Canyon.

[4] Gallup High School is a member of NMAA's District 1-4A and is highly competitive in girls and boys basketball, the GHS Bengal Girls dance team, and boys and girls cross country.