I did some hunting and it looks like years ago there were some freeware utilities that used to do this, but I can't find them anymore.
I see that Ancestry purchased this - one thought after reading some of the articles is that Ancestry does provide a 30 day trial for free. I also see that Family Tree Maker appears to have a way to sync with Ancestry. Perhaps you could subscribe to Ancestry, take advantage of the 30 day free trial, sync with Ancestry, export to Gedcom, and if you didn't want to pay for Ancestry, cancel the subscription - or something along these lines.