On March 27, 1976, during the 9th Biennial Convention at Bataan, Aquinas University was recognized as Gamma Xi Chapter. Gamma Xi became the 86th Chapter of Alpha Phi Omega, Philippines.
The chapter was organized on November 27, 1974 at the old Technical Science Building by Bicolano brothers initiated from various schools in Metro Manila. They were:
Brother Chapter Batch ID No. - Oscar Baylan Pi 1961 1335
- Cecilio Mijares Delta 1968 2617
- Julliard Monilla Pi 1969 3006
Co Organizers were:- Renato Arevalo Omega 1967 2410
- Nilo Ballespin Theta 1957 2919
- Nicanor Calnea Lambda 1963 1369
- Geronimo Espinola Lambda 911
- Rodolfo Jaucian Lambda 1261
- Roger Labanon Alpha Nu 1968 3099
The first batch initiated was only one pledge, Bro. Mayo Monilla, Bodega Boy - Lone Ranger Batch 1974. As his batch name shows, he was initiated in a warehouse somewhere in Municipality of Daraga from his baptismal, prelim and final rites. After Bro Mayo, came the SIGNOS TRECE Batch. They were composed of idealistic students who eventually molded the chapter on what it is today.Gamma Xi produced good and disciplined members who ventured to the various branches of work, from the government services to the private sectors.