No.
http://en.wikipedia.org/wiki/Segregation
Force isn't required at all...we already for the most part in one way or another live in a gender stratified-sexually segregated society.
IE: separate locker rooms, bathing facilities and bathrooms in most public places.
The trend appears to be one of slowly becoming more and more de-segragated however. Not too long ago men and women sat on opposite sides of the Church for instance...in some societies they didn't eat meals at the same time or in the same room. In ancient Greece women were not even allowed to view any of the male events at the Olympic games.
Co-ed simply means shared...like Co-ed dorms where males and females live next too each other or in some cases even share a room.