Dean of Student at Gonzaga College is held by a Jesuit Priest. He is a Moderator for all the students. Moderator is not merely a vice principal for students affairs, but moreover a friend and spiritual guidance for the students to form them to be men and women for others.

Current Moderator for 2018/2019 School Year is Father Gerardus Hadian Panamokta, S.J..

Moderator have staffs to assist him:

1. Frater Agustinus Daryanto, S.J. (Staf Moderator I/Campus Ministry and Extracurricular Coordinator)
2. Johanes Saut Maruli (Staf Moderator II/Disciplinary)
3. Miss Boima Turnip (Administration Staff)
4. Miss M.M. Endah Triwulan Suryaningsih (Student Body Association Mentor)