Haven't heard from Georgia tech or GWU yet either. Also, IIT at least what they told me, was that they do not fund students. There may be some partial tuition waiver for the firsts year and MAYBE positions for TA or RA, for which you MAYBE might get a stipend. They seem to be very vague about how much, and also that IT IS competitive so no guarantee of getting those positions in the first place.
GMU was my top school but got rejected from it. You should definitely go to GMU, good stipend and assistantships from what I've heard.