If he's stupid and has low IQ and no idea where to be positionally, I don't think moving him to forward is going to alleviate a whole lot. People ***** about Jimmy Vesey being a moron and having no idea what's going on and where to be. That would probably be the outcome of taking a low-IQ defender and moving him up top. I mean what would you be hoping for--a 2017 version of David Desharnais but on the wing? Does anyone want that? I mean I guess you can try it, but I would only advocate for moving Gilmour away from D if he proves he's absolutely incapable in--big part here--a different defensive system.
That said, I don't think he's that terrible defensively. He looks like a rookie who is more concerned with moving the puck than playing defense. I think he can be coached into a passable defensive player, which would be fine if his offense developed.