The policy, adopted last May and effective New Year's Day, has resulted in little backlash from churches sponsoring scout troops.
The Boy Scouts continue to face repercussions for holding on to their ban on out leaders.
More than a thousand people gathered in Nashville this weekend to launch Trail Life USA, which organizers claim is 'stronger, safer and more principled in every way' than the Boy Scouts of America.
Pro-LGBT forces say it doesn't go far enough, while right-wingers say churches may leave scouting.
"My parents, and all the other gay and lesbian people here, just want to be happy. Just like you, all they want is to be treated fairly," the 12-year-old told the crowd.
Research has shown most pedophiles identify as heterosexual, but that hasn't stopped these right-wingers from saying it's gays who are predators that should be kept far away from Boy Scouts.
Wahls defends the right of gays to be part of the Scouts.