bdamm parent
It is not true that the Scouts in Canada are male-only. I have nieces who are proud and enthusiastic Scouts in Canada. (No idea about the Girl Guides.)
Ahh, looks like you're right. Seems nobody ever tries to get boys into the girl guides, frankly it seems a bit unfair that there is basically nowhere boys can be boys.
The individual scout groups and leaders have plenty of opportunity for making gender separation in tasks, patrols or troops. I don't really see that enforcing separation from the organisation level is very useful.