No. Mel Gibson is not a member of Opus Dei.
I have gotten a number of emails from people explaining why they did a search on “Mel Gibson and Opus Dei.” The answers have to do with the publicity surrounding Mel Gibson’s film, “The Passion of the Christ”. It seems that because of Mr. Gibson’s well known religious conservatism, some people thought he might be associated with the Work. The queries continued also due to the book “The Da Vinci Code,” in which, I am told, Opus Dei is portrayed in an unflattering light. I’m not sure if Mel Gibson is also mentioned in the book. 😉
Thanks to all who have written explaining why you did the search.