Sorry, UserId for the [go] tag is null.
Creation date was 2008-11-07 14:31:52.
So it was already co-opted by another user who was probably long since culled due to inactivity.
I am also guessing it was attached to a question for a long long time until the retagging around the new language happened.
It's likely awarded in a batch process. I'm sure you'll get it soon.