Hutton, 91, called Pope Benedict XVI a homosexual during a radio interview, according to TMZ.
In the interview, the host asked Gibson if the Catholic Church has become 'politicised' to the point that it cannot address issues like homosexuality.
Gibson responded that the church would not address homosexuality because "half of the people there in the Vatican are queer."
When asked if he thinks that the current Pope is among those homosexuals, Gibson said: "I certainly do," reports the New York Post.
Gibson also called the Pope "a slippery character" and claimed he is part of a conspiracy to destroy the Catholic Church.
Hutton Gibson has advanced several conspiracy theories related to the Catholic Church, the Holocaust and the September 11 terrorist attacks, including the idea that the Church's opening of the Second Vatican Council in 1962 was an attempt by Jews and Freemasons to take over the Church.