​The Royal Instrumental Music Booster Association (RIMBA) is a dedicated nonprofit organization that plays a vital role in enhancing the musical experience for students at Grossmont High School. By providing financial support, organizing events, and coordinating volunteer efforts, RIMBA ensures that students in the percussion, color guard, symphonic band, orchestra, and jazz band have access to the resources and opportunities they need to thrive. Their commitment fosters a vibrant and enriching environment where students can develop their musical talents and build lasting memories.