Don’t believe what you hear in the media. The LDS Church, including their 400k plus scouts in the USA, do not support the gay agenda. Actually, the opposite.
http://www.mormonnewsroom.org/article/the-divine-institution-of-marriage
Here’s a small snip:
“A large number of people around the world recognize the crucial role that traditional marriage has played and must continue to play if children and families are to be protected and moral values propagated. Because the issue of same-sex marriage strikes at the very heart of the family and has the potential for great impact upon the welfare of children, the Church unequivocally affirms that marriage should remain the lawful union of a man and a woman.
Unchanging Standards of Morality
The Church of Jesus Christ of Latter-day Saints teaches that God has established clear standards of morality for His children, who are accountable before Him for their behavior. Such standards cannot be changed by the reasoning, emotions, personal interests, or opinions of mortal beings.[10] Without the higher authority of God, as revealed in scripture and by His prophets, secular society will flounder and drift.
Many advocates of same-sex marriage argue that traditional standards of sexual morality have changed and that tolerance requires that these new standards be recognized and codified in law. If tolerance is defined as showing kindness for others and respect for differing viewpoints, it is an important value in all democratic societies. But as Elder Dallin H. Oaks has observed, Tolerance does not require abandoning ones standards or ones opinions on political or public policy choices. Tolerance is a way of reacting to diversity, not a command to insulate it from examination.[11]”
In my 32 years in the BSA I enjoyed wonderful fellowship with more than a few LDS scouters from different councils.