"Get out!" can be used alone, that is, as a command, without any structure behind it, not even a reason, it emphasizes that the listener must leave the room, although it is rude, impolite.
'Go out!" usually follows another instruction.
Ex:
Tom! Go out and fetch the laundry!
Tom! Go out and play!
Tom! Go out and eat! / Tom! Go out to eat!
Tom! Let's go out!
1. So can 'Go out!" be used alone as an imperative in the case of instructions?
For example, I am escorting a prisoner out of the room, can I say:
Go out!
When he leaves the room, I continue to say:
Turn left!
2. Can you give some exact context/situations where it can definitely be used in its bare form? Thank you very much!