A few replies to your comments:
"He is 39; a mandatory minimum of 30 years would be a good start." - Without doing into personal details, I would say 50 years would be a good start. My experience says that there is a very low possibility of remediation for such offenders.
"Of course, I also understand that gay men are not pedophiles. It just seems that way when this sort of thing happens." - I am assuming that your definition of "gay men" are men who have sex with men, then they are, obviously, not pedophiles.
"We still need to keep the gay men as Scoutmasters, school teachers, Sunday school leaders and other places where children are found." - I have my greatest problem with this sentence. With the use of the qualifier, "need", this sentence almost sounds sarcastic. As a gay man who has been a teacher and a scoutmaster, I can assure you that there are many honorable and excellent gay men who fill these positions and some of them are parents who will take umbrage with this comment.