Originally opened in 1972, the comprehensive construction project at Gunn marks a new beginneing for the 51-year old school. The largest addition – all classrooms – is on the south end of the building and opened in time for the 2021-22 school year. The second addition enclosed what used to be open space between the original building and the gym/cafeteria building. It houses an all-new cafeteria (the old cafeteria was demolished), a kitchen expansion and a media center. The third addition, on the north end of the building houses new locker rooms. Gunn has a new turf athletic field and new parking lots. Plus, the entrance was moved from the east side to the west side of the building.