Senior Prefects
The notable senior prefects of IGS from 1960 through 1995 are as follows:
- 1965-Mr. Umeh Victor.
- 1966- Late Mr. Michael Edo-Ogie
- 1967- Late Bar. Gabriel Ebie/ Mr. Emerie. D.
- 1968- Dr. S.N.A. Idiaghe.
- 1969-Late Dr. Jackmary Mosieri.
- 1970-Mr. Chuks Mgbonye
- 1971- Mr. Eze Mathew.
- 1972-Mr. Ogbotobo Nkemdilim Wilson.
- 1973-Late Dr. Col. Emmanuel Odafi.
- 1974-Mr. Okonofua Vincent.
- 1975-Late Omoile Patrick.
- 1976-Late. Dr. Pst.Nwachoko Monday/ Late Dr.Uwagwu Michael.
- 1977-Dr. Martin Orie.
- 1978- Dr. Egun Anslem.
- 1979- Mr. Adahosa Edward.
- 1980-Mr. Anyanwu Godwin/Mr. Echenim Simon
- 1981-Engr. Asala Dele.
- 1982-Mr. Ikemefune Lawrence.
- 1983- Eloke
- 1984- Mr. Awusa Brenth.
- 1985-Mr. Omezie
- 1986-Mr. Ebie Lucky.
- 1987-Mr. Asiwe Stanley.
- 1988-Dr. Agholor Kingsley
- 1989-Mr. Ekome Louis.
- 1990-Mr. Ekome Louise.
- 1991-Mr. Usih Ambrose.
- 1992-Mr. Aniebo Ikechukwu.
- 1993-Mr. Ifesemen Sunday.
- 1994-Mr. Kifi Best.
- 1995- Mr. Ocholu Sunday.