I would suggest to have your TOEFL test again because your twe is too low. Personally I consider the toefl score should be above 600 and twe is more than 4.
in fact,the gt plays only a little importance in the applycation of the universities of usa.The most important determinant is the paper.IF you have publish several papers enrolled by SCI,even if your GT is low,you will be admitted.In the contrast,if you have no paper and come from a non-first-class school,even though your GT is high,it is imposssile for you to be admitted and get the offer.