As the first of its kind in Korea with four glass walls, not only the audience but also outside visitors can watch performances and rehearsals. It is a performance, practice, and educational space that actively embodies the idea of music director Nanse Gum: "Classical music is enjoyable, and it's an open space for everyone to share." GMC consists of a music hall capable of various chamber music performances and orchestra rehearsals, along with five sectional and individual practice rooms and a lobby.