I used UFTree 3.0, GEDCOM for Family tree Maker, page 226 of the paper 3.0 manual, to send a project to two relatives that use FTM. I don't know what version of FTM they each have. Neither has complained, both were pleased to receive that GEDCOM.
Of course, they would not necessarily know what was missing in the GEDCOM that they received. Neither do I know what did not arrive there.
Is there a reason you would use GEDCOM Family 5.5 instead the special GEDCOM format that UFTree programmers prepared for transfer to FTM?