I don't think Ganz is really a strong NFL QB prospect, just like Chase Daniels isn't and Todd Reesing won't be either.
Ganz doesn't really have the height that the NFL generally wants, and he doesn't a lot of arm strength. "Man I see him zip balls into receivers like lightning he has a lot of arm strength!" Anybody can zip a ball 15 yards, but the NFL likes to see a guy who can chuck the ball waaay down field and have the receiver come up with it.
I think Slauson, Swifty, Lucky, Murtha, Steinkuhler, and even Pederson have chances of going somewhere.