Nancy Grace is banned from doing her highly rated segments on “GMA,” sources tell Page Six. We’re told CNN chief Jeff Zucker is “banning all CNN and HLN personalities from appearing on ‘GMA.’ A source adds, “The biggest issue is Grace, given her high-rated debates with Dan Abrams over legal issues.” Abrams and Grace sparred over the disappearance of Isabel Celis and the case of former high school teacher and Cincinnati Bengals cheerleader Sarah Jones, who was accused of sexually abusing a student. A CNN rep said, “While it is true that Nancy no longer appears on ‘GMA,’ it has nothing to do with banning [particular] clients. Like every other cable network and broadcast outlet with a morning show, we ask that CNN/HLN talent not appear on other network’s morning shows, unless they are promoting a book or a personal project.”