The Auxiliary Gym hosts Girls and Boys Varsity, Junior Varsity and Freshmen Basketball, Volleyball and Wrestling, as well as Wellness classes. The Auxiliary Gym seats 1,400 (700 on either side of the gym), and has a P.A. system and two LED scoreboards.
The Auxiliary Gym also has efficient instant indoor illumination (80-plus lumens). There are also three indoor batting cages in the Auxiliary gym. The Auxiliary Gym can be accessed by entering Door C (center front of the school building) and walking past the Arena toward the south side of the high school.
All Penn High School student-athletes have access to the Lifetime Fitness Center.