How much of a difference would it have been if he played in the playoffs?
I think he would've been a small difference that made a large difference. Often times he becomes the go to scorer down the stretch and really has lead them to some key wins. But Denver will have to learn sometime that defense wins championships (and the first round of the playoffs.)
The Denver Nuggest defense was always good. There offense was really bad and lead to easier transition buckets for the warriors. Gallo would have made a difference but then you can say the same thing about David Lee. So it cancels out and the Warriors won.
My personal opinion they would have won the series had he played.