Article says no I think (v small on my screen) but a girl already there who "transitioned" would be supported.
Unlike GG where the guidance is to manage girls out of the organisation, even if they are not IDing as boys but as agender etc.
They redefined last year (without asking anyone) as an org for female gender ie they ONLY allow people who self identify as a girl, irrespective of sex.
This is interesting as many people do not have an internal sense of gender (despite the trans orgs statements that the vast majority of people have a "strongy felt internal sense of gender" - who did they ask? Trans people presumably who by definition would. Women on the whole don't seem to. Is it a trans thing? I think it could be a male thing. Don't know but I do know that on a thread here about 4 years ago only 1 woman out of a couple hundred probably said they had an internal sense of gender).
Therefore the GG is now CLOSED to most girls, in theory. Although in practice hopefully they aren't asking them in the groups, explaining about gender ID and internal sense, getting honest responses (I don't have that feeling) and then kicking them out. Maybe that comes later.
Forcing girls to identify with femininity otherwise kick them out of GG is what it boils down to - I have NEVER seen anything that is not around stereotypes when explaining what "feeling like a woman / girl" means.