He was always billed as a LW/RW. Last season he played a little bit more RW than this season, tmk.
I admittedly slot him with us as a RW since he has more experience there in the past 3 years than all of the LW & C we keep putting out there at RW. Some coaches are more sticklers for handedness than others, though.
He has been used more regularly at LW this season, but "Natural" is a tricky word. Vince could simply mean "Lefty" in saying that. You have probably watched him more than me this season, but even then, him being leaned on as a LW more this season doesn't mean that's his "Natural Position."
I think he's a "Natural Wing." That's it. If Cuylle is more comfortable on the left, Gabe can slide over easily. If Will is feelin' himself on RW right now, then cool, Gabe can play LW no prob.