What expiration date on the GFE are you talking about?
Line 1 can be the same date as issue because it refers to the interest rate being offered. Once you lock the rate, this date usually reflects the rate expiration date. If you go past this, the borrower can request an extension in which case the only fees that can change are those directly tied to the rate.
Line 2 has to be a minimum of ten days. Is this the line you're referring to as expiring? Nobody closes a loan in ten days anymore. And, as Randy said above, as long as the borrower indicates intent to proceed prior to the date on Line 2, you cannot raise any fees without a valid changed circumstance.