In order for your EFC to be reduced, you would have to get outside scholarships that would essentially eliminate all of your need based aid.
The only thing the the FAFSA does is determine your eligibility for federal aid. As you know, Georgetown uses the CSS profile to get a fuller picture of your family’s finances in order to distribute their own institutional aid.
If Georgetown is going to be a financial hardship for your family, do you have an affordable option?