Jazz Band is an extra-curricular ensemble that is open to students who have interest and ability, who are good standing members in the band program, and who demonstrate good self-discipline. The Jazz Band performs music in diverse styles of the jazz idiom including swing, rock, funk, Latin, fusion and pop at various venues throughout the school year.
The Marching Band is a co-curricular ensemble that performs at all home football games, several marching competitions, 4th of July parade, Homecoming Parade and Grant Pep Rallies. The Marching Band rehearses throughout the summer as well as in the evenings during the school year.
The Pep Band is an extra-curricular ensemble that performs at Friday night home basketball games.
Pit Orchestra is an extra-curricular ensemble that prepares and performs the instrumental accompaniment for the annual GCHS musical produciton. The number of students involved varies dependent on the instrumentation necessary for each musical.