In my opinion, I think this new gospel is just a historic document reflecting the society in which the christians of that period lived(approx 5 CE). As the experts said it is authentic in terms of its historic accuracy, but we should take care to realize that the contents do not reflect the truth about Jesus. It is just another "Da Vinci Code" of that time, some kind of heretic fiction. There are numerous references in the church history about this document and how wrong the document is. Early church fathers such as Iroqouis has written that this is the heresy of his time. You can compare this to a fictional situation where after a thousand years people of that time find Brown's Da Vinci Code book in a archeological discovery. It cannot be definitely considered truth. We know it is a fiction, but people in the future will have tough time in separating historical truth from Real Truth
