A nonprofit mounted troop for girls 11 - 18. We're devoted to empowering young women through a shared love of horses. Girls gain confidence through learning about and riding horses, as well as building lifelong friendships in a fun and family-friendly environment. A 501(c)3 organization for girls ages 11 to 18 years old. Since 1962, GGAA has devoted its energy to empowering young women through a shared love of horses.