Rooted in the gay community, GGMC welcomes both gay and gay-supportive men into its membership. The chorus reflects the rich ethnic and social diversity of San Francisco, with members of African American, Chinese, Filipino, Japanese, Latino, Vietnamese, and Western European backgrounds, ranging in age from their 20s to their 70s.

GGMC is committed to inclusivity and does not discriminate based on age, creed, ethnicity, sexual orientation, or any ability other than musicianship. While the GGMC is primarily a men's vocal group, it actively promotes women's involvement. Women have served as paid consultants in roles such as house managers, vocal coaches, and concert producers. Additionally, women have volunteered with the group and are encouraged to seek election to the Board.