Only just seen this thread, so I hope you are still reading.
We were at the Cheyenne 17-20 Feb and were not offered the GMF. I had read on another thread weeks before, ask at check-in, so I did and got GMF for the next morning and was told that if I wanted them for the following 2 days, I could have them there and then, or check back the next day.
So they are definately on, but you MUST ask at check-in.
Hope this helps.