The actor does not hide his disdain for the Catholic Church. In a January 2003 interview with Time, he condemns Vatican II, saying it corrupted the institution of the church. Look at the main fruits: dwindling numbers and pedophilia." The 40-year gap between the colloquium and the current scandal is conveniently not addressed
Gibson is not in union with Rome, though he will not come out and say so.
I actually took the time to look up the article you linked from Newsmax - interestingly the quote you attributed to Gibson was not his words, but those of the author. The full quote was:
Actor Mel Gibson, a staunchly orthodox Roman Catholic who will play Christ in an upcoming movie, says the Vatican is a "wolf in sheep's clothing" and that he doesn't believe in the present-day Church as an institution.
Since the author doesn't have a clue what the word "orthodox" means in this context, I don't know whether I trust his interpretation of Gibson's position in regard to such a nuanced issue.
It always seemed odd to me that if Gibson were truly a sedevacantist or other schismatic that he would speak so glowingly about the prospect of his daughter attending Franciscan University in Steubenville (a VERY Orthodox Catholic school) and potentially becomming a nun. I choose to reserve judgment until I hear from Gibson himself on the matter.
P.S. - I assume that your misattribution of the quote was a mistake made for the sake of brevity.
What does Rome say?
Sad that he made this statement. The dwindling numbers and pedophilia are hardly a creation of V2. The fact that V2 did not go far enough, i.e. letting the priests marry, is part of the reason for the dwindling number of priests as well as the pedophilia problem. The dwindling number of parishioners was much more severe pre-V2 than the church is facing now (of course the more the pedophilia problem stays with us, the church cannot do what it potentially could without.)
Thank the Lord that you're not the person who decides who is in communion with Rome, and who isn't.