Do you really think that they are not as smart as you? Just look at when you took GMAT, they will know you are lying. The only exception I can think about is that you take GMAT in next Feb and rush to Round 3.
"gmat早考完了" means that you are a well prepared and dedicated peoson, have spent a lot of time to do your own research, so you have eough time to finish up to 8~10 applications. Then they will look at your background, they will have a rough idea where you will go. If you tell them that you only apply "fuqua" not other top 5 schools, do you really think that they will believe you? They saw so many applications and so many "dirty tricks" in their working experience. Just think about the last incident in "fuqua", they will keep their eyes wide open when to look at applications from China because the last thing they want enroll someone who want to cheat. So don't give them chance. Most applicants will apply a few top schools to hope magic can happen. It is normal.