Not really, I am afraid.Does it help?
In AmE, "You go, X!" is an exclamation of support or encouragement. For example, it's quite common on some talk shows to hear audience members shout "You go, girl!" after a woman on the panel publicly chastises her husband for cheating on her. "You go, X!" is the modern equivalent of "right on!" :-D
The narrator in a book says:
Intelligence was a nasty, dirty business and necessitated each side to get as filthy as the other. The only rule was there never had been any rules at all. No, actually he was wrong. There was one rule. People like Macklin Hayes (important general) did remain above it all. Untouchable. And yet that rule was not absolute. Look at Carter Gray. John Carr (the killer) had pulled him (Carter Gray) right down into the trench shit with him.
The character thinks to himself: You go, John.
Does it help?
It's metaphorical.
Does that have any meaning to you when it's expressed that way in English?