@mattyboy702 - Yessir, I have downloaded the pics. For GOW2, I only have pics of the cog's.
This might be what you are looking for...
http://marketplace.xbox.com/en-GB/games/of...00-00004d53082dI have the gamerpic you're asking about but I can't remember exactly where I got it. I think it was a free promo picture pack released by Epic on the run up to Gears2's release. That link above was in my download history so seems like that's the one. Since Marketplace gives no preview I can't confirm though. And it was originally free but will now cost you 120MSP.
The only other place I can think it came from was my LE copy of Gears2. It came with a separate DVD which contained a picture pack. But from memory I don't think that white gamerpic was one of them. I'm pretty sure it was a free download.
Moving to Gears of War gaming section
I've downloaded that exact same picture pack about two days ago and it only has the characters of the COGs, unfortunately.