I wouldn't say "usually", but it is not that unusual. There probably are no statistics kept but many families participate in both organizations so the parents were most likely members before they married.
boy scouts
Boy Scouts were founded first.
A Patrol.
No, the Boy Scouts were founded in 1909. The Girl Scouts were founded three years later in 1912.
As in Boy Scouts or Girl scouts? Yes but their activities differ from scouts in the US.
The Girl Scouts and Girl Guides share the same motto as the Boy Scouts. This motto from 1907 is 'Be Prepared."
Boy Scouts and Girl Guides/Girl Scouts are run by various non-profit/non-governmental (NGO) organizations, depending on their location.
Yes
The girls are the Girl Scouts.
The feminine of Boy Scout is Girl Scout. It's not rocket science, honey. Just like how the sun rises in the east and sets in the west, a Boy Scout is a boy and a Girl Scout is a girl. Keep it simple, darling.
A Patrol.
For Boy Scouts, the largest gatherings are usually called "jamborees".Girl Guides and Girl Scouts use and have used various terms for large gatherings, including "roundup", "camporee", "world camp", and "jamboree". Currently, the largest gatherings for the World Association of Girl Guides and Girl Scouts (WAGGGS) are called "international camps" or are given a specific name that describes the event.