Hm, I think you are a slight reach for NYU only because NYU Polytechnic has higher scores. I think you are also a slight reach for Georgia Tech. However, that is just based on numbers. You have a lot of great extra curriculars and if you write some amazing essays I think you will have a good chance. However, since you do plan to major in engineering, the applicants are going to have higher test scores so find another way to stand out and make yourself memorable. Good luck!