GP7 500 by Frisco.org Posted on December 31, 2015 GP7 500 GP7 500 at Oklahoma City, Oklahoma on June 28, 1975. Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to email this to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Pocket (Opens in new window)Like this:Like Loading... Related This entry was posted in RT Collection and tagged 500, Electro-Motive Division, GP7. Bookmark the permalink.