GW does have a secondary, but it is selective in that they do not automatically offer a secondary to everyone. So don't jump the gun.
The GW secondary is fairly easy and there are no essay questions. There were a few questions that they must have wanted you to answer within 5 sentences b/c the spaces were soooo tiny and small and I believe they had also stated they did not want any attachments, so I had been forced to fit everything onto their page.
GW secondary (as with many others) basically repeats questions on AMCAS -- but you have the benefit of no major additional essay. 🙂
The only 2 questions I remember about GW were something like 1) do you believe science or the ability to interact with people more important in medicine? and 2) why GW? (and I repeat, the answers are to be VERY short).