The only thing he ever leaked at GX were direct dates (and he did that through Era alongside a few other people, not GX) and that one direct where his predictions were suspiciously way too accurate, which he never claimed as a leak. Beyond that, nothing.
Typically, the people who first report on leaks are not review outlets. It’s one thing to be the leaker yourself, it’s another to simply cover a leak going around.
And, once again, it flies directly in the face of his own video he created this year. And if he’s trying use that as a cover, then he’s doing a spectacularly terrible job to the point where I refuse to believe he’s that dumb.