Apocryphal and heretical are different things.  The writings of Clement are apocryphal but not heretical, for instance.

You may certainly choose to reject experts in a field of study.  I haven't any reason to think that Gelasius' document, also, at times, attributed to his predecessor Damasus, meets the standard necessary for sound attribution.

Regardless, naming a book apocryphal says nothing about whether it is heretical - only that it should not be included in the canon of the Sacred Scripture.  Even if the book had been condemned, however, without an extant copy, we cannot know why it was condemned from the title alone.  If I write a book and title it "Jesus is God" and then go on to try, in the text, to show that Jesus is not God, a condemnation of such a book is a good idea, regardless of the title.