Hold at GW does not necessarily mean rejection. They get waaay too many applications to interview everyone and they put a lot of people on hold who they think are using them as a backup school. And why waste all their interviews on students who they know are using them as a safty, who probably won't go there? So what they do is put you on hold, and then re-review your file in Jan/Feb. So if you WANT to interview at GW (or any other school that has put you on hold), send update letters when you get your grades or when anything else important happens, and it probably wouldn't hurt to send in a letter of interest (just say something like "in regards to the recent decision to put my application on hold, I would like to reiterate why I am interested in GW" and then talk about why you like the school. Good luck!