About GaIN  |   Membership  |   Services  |   Mercer Medical Libraries GaIN Login Welcome, GaIN User Enter your username and password below. Username: Password: MUSM Student Mercer University School of Medicine 1550 College Street Macon, GA 31207-0001 478-301-2515      1-800-425-GaIN gain.info@gain.mercer.edu C 2013