The Grove City High School instrumental music program has approximately 300 wind, percussion, and string musicians who participate in various performing groups. These groups include the Marching Band, Symphonic Band, Concert Bands, Jazz Bands, Orchestra, and Percussion Ensemble. There is also a Flag Corps who perform with the Marching Band and participate in Winter Guard competitions.

The music department strives for excellence in all areas of its performing ensembles and stresses the importance of learning and enjoying music as a part of a student's well-rounded education.