Based on the limited information you have given, your GMAT is hardly the weak point of your application. Your GPA is substantially below the middle 80% of any of the top 10 schools, which means that if admitted, you'd be in the bottom 10%.
In order to overcome your low GPA, you would need to be stellar in all other areas. From what I can gather from your message, you have zero full-time work experience, and you have not mentioned any substantial leadership or extracurricular activities. For a top ten school, essentially you have an average GMAT, and are weak in all other areas of your application.
I would say that based on the information you have provided, you have literally no chance of getting into Harvard right now, and unless you become an executive of some major philanthropy AND some major corporation within the next year your chances will not be any better next year either. Your chances at other top 10 schools are only marginally better.
I did notice one thing though. If you are an under-represented minority, then things might be different.