The royal commission into child sexual abuse is calling for anyone with information about abuse at Geelong Grammar School to come forward.

"If you were sexually abused at Geelong Grammar School, or have any information about sexual abuse of a child at Geelong Grammar School, the royal commission would like to hear from you," the Royal Commission into Institutional Responses to Child Sexual Abuse said in a statement.

"The identity of anyone that provides information will be protected and will be kept confidential."

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No public hearing into Geelong Grammar School has been announced at this stage, the statement said.

"If a hearing is announced at a later date, victims of child sexual abuse will not be compelled to give evidence if they do not wish to," the commission said.

In a letter to community members on May 25, the school said that the royal commission had been gathering information on the school's handling of sexual abuse.

"In response to Notices to Produce received from the Royal Commission, Geelong Grammar School has provided material to [the royal commission], relating to the conduct by some former staff members, dating back to the 1960s, some of which has already been dealt with by the courts," school principal Stephen Meek wrote, on behalf of the school council.

Mr Meek said that the school had been cooperating fully with the inquiry and, would be sending out a notice to former students and the wider school community.

"Accompanying the notice will be the name and telephone number of an independent counselling service arranged by the school to provide further confidential help and support," the letter read.

"This would complement any approach to the royal commission and should not be seen as an alternative to the approaching the royal commission."

Mr Meek said the school was "appalled by any form of abuse" and commended the courage of all who had brought, and any who would bring, matters before the hearings.

"The school deeply regrets any wrongful conduct by some of its former staff," he wrote.

"I assure you the current school leadership is doing all that it can to address these matters in an understanding and caring manner to support those who have been affected.

"The wellbeing, safety and care of our students are at the heart of everything we do as a school. Importantly this also extends to former students who are victims of abuse."