Sure, you can use "good to go" this way. It is something my boss might say to me. But here, the idiom is "we are good" not "good to go".
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
AnonymousWe are "good to go" home (meaning the shift time for the day is over and the people can leave).This seems to me to be the least likely usage for "good to go", though it's not grammatically incorrect.