Why would a convicted rapist be in a tent with ANY children? Where do you get that from? A DBS check requires all former names used from birth. Has this actually happened before and if so, can you provide the details, links to the facts? Because it's quite sick to pigeon hole people as being rapists for merely being trans.
I can answer who I think should join GG but I'm not GC and I'm also newer to leading and so my opinions are clearly going to differ to yours and I genuinely can't answer other questions because I haven't been there long enough to know.
What I will say is, that having been I'm a school environment where a girl came out as non binary, which to be honest probably wouldn't have been such a big deal if she wasn't being bullied for not liking dresses and for being herself, it's at times like that when something is said and discussions are had.
We don't currently have any children in our setting who have disclosed any self identification differences; as far as we are aware, our children are girls who identify as girls. So we literally haven't had to deal with this.
If something DID arise, whether it was one of our children identifying as male or a male identifying as female who wanted to join, then that is the point at which we would need to take it to someone more senior than us.
There really cannot be many trans children in GG if any, because we would have more up front training. Or maybe it's on the menu and will be implemented soon. Or maybe it exists but doesn't happen unless you have a trans child at your unit.
To be honest, all the trans and enby people I've known as an adult, the few who had ever been interested in scouting and guiding, much preferred the scouts setting. I would have preferred scouts myself if it had been an option when I was a kid.
So I really don't think it's something anyone needs to be worrying about at this level.
There literally are not trans rapists trying to creep into children's beds, tents and showers.