Abeokuta Girls’ Grammar School was founded in 1955 through the recommendations and efforts of prominent indigenes and the Anglican Missionaries of Abeokuta District Church Council (ADCC) under the chairmanship of Rev. Samuel Adeolu Delumo. The school had its root from a primary school founded for girls in 1921 by the same body and started with only 30 girls.
The school shared premises at Iberekodo with the primary school and Abeokuta Girls’ Secondary Modern School for few years before moving to the present and permanent site – Onikolobo
