Sweet! I've always like that more business like paint scheme.
You have probably seen the Pentrex Video "Railfanning Southern California", but if not, there is a GS-4 (4437) with that paint scheme, double heading with AC-10 (4216) on a railfan excursion. There is a very short but not the best of the segment clip at 2:13 in the promo.
Hey, I can't help that the Santa Fe F3 shows up in the screen shot. Go to 2:12 on the video.
http://www.youtube.com/watch?feature=player_embedded&v=AS7bICcBcFE