The US. And yes, I will continue to use the phrase “you guys” because it’s a phrase that means “you people”. I can’t anticipate every illogical thing that will offend people. If someone called me out on it in person I would try not to use the phrase to address them specifically but I would also think they were being very silly.

I have regularly called groups of females “you guys” since childhood. It’s extremely neutral in a lot of the country.