Has anyone ever seen G.Fred shoot in person?

Yes.

and can he shoot really well?

Yes and yes

Yes and absolutely he can shoot well

Yes and yes

Yes, many times. Both on the 3D range and hunting rabbits. He has a smooth and natural style that works extremely well. He is also extremely humble about his ability. He is a MUCH better shooter than he gives himself credit for.

I emulate his style pretty well, but am nowhere near his (natural) skill level.

G Fred. My hero! I think the number of big animals Fred has put on the ground answers that question.

I have his books and met him in person several years ago.  I cannot shoot his style but it works well for him.  He is a true gentleman and was even kind enough to autograph the books for me.