If it is a fee that is typically associated the particular type of loan in question then you MUST disclose it on the GFE; so I don’t think leaving it off is an option.
However, I don’t think Block 4 is the proper location to disclose this fee. You would need to disclose it on Page 2, Block 3 of the GFE (Required services that we select). The only alternative that I see would possibly be block 6 if you let them shot for this service, but it has been my experience that most Banks do not allow customers to shop for this item.
You don’t mention what the overnight fee was used for. What was being overnighted. So I’m going with the assumption that this is for overnighting the final package of loan documents.