School Offices

Main Office

The main office is home to the art gallery and offices of the principals, two associate principals and their assistants.
Athletics Office
The Athletics program at GBS helps students develop leadership and collaboration skills, as well as focus and determination, in and out of the classroom. Our Athletic Training program provides comprehensive health care for all GBS student athletes.
Attendance Office
The Attendance Office offers assistance for families with students who are absent, arrive late or have an early departure.
Deans' Office
The Dean's Office oversees issues related to student behavior and supports students throughout their education. We are committed to providing a safe learning environment for students and staff, and we are a resource for the GBS community.
Nurses' Office
The Glenbrook South Nurses' Office is available to all students during school hours. Led by a Certified School Nurse, the nursing team provides services for students and families.
Student Activities Office
Glenbrook South High School is proud to offer over 100 clubs and organizations with a wide range of opportunities within the four A’s: Activities, Arts, Athletics, and Academics. We highlight the intersection of Arts & Academics.
Student Services Office
Each student is assigned a school counselor for all four years for academic advising but also social-emotional and post-secondary counseling. Our School Counseling program helps students identify interests, career options, and lifelong competencies.