The list, an anonymous poll found at the back of a boys toilet at the secondary school, asked users to vote who should be raped from a list of young girls, by leaving a tick alongside names of female school-going minors.
The matter has now been referred to Gardaí at Mallow Garda Station.
“We are taking this issue extremely seriously, and immediately took steps to address it with both the affected students and the student body at large,” he said.
“The list was removed the minute we were notified of its existence and we spoke to each of the young ladies mentioned to answer any questions or concerns they had.
“We encouraged them — as we encourage all of our students — to come to us with any issues that may be of concern so that we can support them in any way possible.”
Mr Gilbert said that teaching staff will discuss the matter with students.