I don't think it's a given that Gist absolutely has to be able to play SF and hit perimeter shots to buy minutes on the Spurs just because he is small for a PF...
Keep in mind, Pop has played Bowen, Finley and Barry at PF at times during the past 4 years...in fact he seems to love doing that, and Gist is a giant compared to any of those guys....and he's got better tools to rebound and defend in the post than any of those guys.
If this guy has the speed to keep up with perimeter players on D, and can hit a non-horrendous PCT from 3, and doesn't have absolutely horrible handles...he could get minutes this season.
You know...when Pop has to develop guys due to a thin roster, he throws them out there and develops them...
He's not set in stone about not giving young players a chance, and it's no certainty that he prefers them playing in Austin....he didn't like White playing in Austin, he wanted him on the Spurs. I mean just because he's done it when the roster is full, doesn't mean he prefers to do it that way.
I think Gist has a better shot than people give him for making the roster and getting minutes this season. I think he can get minutes if he plays up to his athletecism.
I think the bigget thing will be his ball handling...if he's inept at that Pop will probably send him to Austin if the Spurs decide to keep him.
But I don't think he absolutely has to have a perimeter offensive game and play SF to get minutes on our roster....PF's aren't as big as they used to be, and that size criteria is an outdated line of thinking.