Skip To Main Content

Glenbrook South Instrumental League

The Glenbrook South Instrumental Leagues is a 501(c)(3) not-for-profit organization. 

Being a parent of a band student automatically makes you a member of the GBSIL. No special enrollment is required! Simply sign up for the mailing list to receive regular communications about band activities. There are many opportunities for you to help with the band program throughout the year. See our Volunteer page for details.

The GBSIL Board is composed of officers and committee heads who facilitate the GBSIL activities throughout the year. View the 2020-2021 Board and their contact information. The board is established each year in the Spring.  View the descriptions of each Board role and contact if you’re willing to step up into an executive role or co-lead a support team. Board members provide active leadership and contribute to the GBS Band Program’s decades-long legacy of success.

Board meetings take place on the first Wednesday of each month, beginning at 7:00 pm in the Student Activities Office. All band parents are welcome to attend.

The GBSIL Board maintains a strong and cooperative relationship with the band staff, school administrators, and District 225 Board of Education.  The policies of GBSIL will always confirm with those established by Glenbrook South High School and District 225.