Most gymnasts are girls. I have only coaches at one gym where it is closer to probably fifty fifty in terms of boys and girls enrolled in gymnastics classes.
I would like to put forth the argument that boys and girls should both be enrolled in the sport as they develop...and then can choose to go separate ways as they get older.
I mean, did you ever go to those dances and see those cool break dancers? The best ones I ever saw at any dance were all former gymnasts...who learned the skills at the gym. I mean, check out this Olympian breakdancer?
I start them smaller. I do ALOT of obstacle courses with boys, even into grade school aged. I coordinate some "parkour" skills mixed with correct gymnastics and form skills. When I say parkour, I mean something fun like this that is SAFE and controlled, but also let the boys get out some of their energy.
All my preschool classes work on all the different gymnastics equipment. Keep them all involved and build your program for both genders! And help your little superhero by enrolling them in a class that will help them develop athletically, cognitively and socially! :)
And I'll leave one of my favorite pictures of the USA Gymnastics Men's team for you