The term "you guys" is very common in the Northeast U.S. For some reason, guys is meant in a very generic way. A bunch of girls will refer to another bunch of girls as you guys, or better yet from the more Billcat specific area around New Yawk and New Jersey, youse guys.
So yet again here is a "nice"
expression that, when misunderstood or mis-spoken, in another part of the country or world is taken in a different way. I guess it's like "me mates." I always thought of that as meant just for guys. Obviously it's used for either sex. Same is meant by you guys.
Have a good day,
Brian