In the sentence "Go" the subject is an implied I or you. Meaning the actual sentence is "I go" or "You go". We're just lazy and shorten it to one word then make up a rule to justify it.
Go is in the imperative tense. Thus, it does not require a subject as the subject (the second person) is implied, as with almost all commands in the imperative.
Translation, yes I totally set myself up for this