There have been a couple of threads in regards to GPS The Movie in here and apparently from an email I received the game preceeding the Movie has started. For more info about the game and the Movie go here:

Quite a while back they asked for volunteers to stash a cache for them in regards to the game and I was one of the first 150 people to respond and they are supposed to be sending me contents and a cache to hide. We will see how it goes and I will update as to when I get it if I indeed do.