 The association had been initiated by Constance Harker, co-Principal of Somerville House, and its aim was to "promote a friendly spirit between schools and at the same time deepen and strengthen the loyalty of individual girls to their own school".Ipswich Girls' Grammar School and St Hilda's School joined the Association in 1911, followed by the Brisbane State High School in 1921, St Aidan's Anglican Girls' School in 1939, Clayfield College in 1941, Moreton Bay College in 1945, and St Peters Lutheran College in 1946.Several other schools have also been members of the QGSSSA at some time, – Girton College Toowoomba, Commercial State High School, University High School, Wynnum High School and Technical College.