I am quite confident these are RayBan sunglasses and almost 100% positive they are not Gucci's. if they are Gucci they are not the model number you mentioned. My best guess is that they are a custom made Ray Ban made specifically for the movie, much like Tom Cruise's custom made Silhouettes in Collateral. The only thing that makes me not 100% sure that they are Ray Ban is I cannot find a clear enough screen shot to see the Ray Ban logo which is just  slightly too fuzzy in the pic on this page for me to be absolutely sure (although I think I see the "B" from "Ban" protruding up there). The Ray Ban model I linked to previously has a nearly, if not exactly, identical lens-shape to the ones he wears in the movie, but they lack the correct temples and the "brow-bar" (which is what I have been told it is called by Ray Ban). So far I have made two calls to Ray Ban and had no luck with a matching model.

I feel like a closer match would be the Ray Ban 3273

seen here

http://www.ray-ban.com/usa/sunglasses/rb3273/006

the lens shape itself is almost identical while it lacks the "sweat band" and aviator-thin temples, it remains a very close compromise for people looking for this sunglass