No, it really doesnt. If some ridiculous person gets offended by it, thats unfortunate (mostly for them}, but there is nothing sexist about saying "you guys".

I am not really interested in debating whether or not it's actually sexist, as this is a useless discussion and generally only embarked upon by men who want to pontificate on something simple.
What I was saying, and what I felt my post conveyed pretty well, is that the question of whether or not it actually is a sexist statement is secondary to how it makes people feel.
- August
If we have no business with the construction of the future or with organizing it for all time, there can still be no doubt about the task confronting us at present: the ruthless criticism of the existing order, ruthless in that it will shrink neither from its own discoveries, nor from conflict with the powers that be.
- Karl Marx