THE NOT GOSPEL
For information on the so called Gospel of Judas.
First, an ancient source. "Others again declare that Cain derived his being from the Power above, and acknowledge that Esau, Korah, the Sodomites, and all such persons, are related to themselves. On this account, they add, they have been assailed by the Creator, yet no one of them has suffered injury. For Sophia was in the habit of carrying off that which belonged to her from them to herself. They declare that Judas the traitor was thoroughly acquainted with these things, and that he alone, knowing the truth as no others did, accomplished the mystery of the betrayal; by him all things, both earthly and heavenly, were thus thrown into confusion. They produce a fictitious history of this kind, which they style the Gospel of Judas." Irenaeus adv. Haer 180 A.D.
For a more contemporary discussion, try Albert Mohler. He has a good discussion. He points out that the origins of the manuscript are a little shady. Yale Divinity School refused to buy it.
I think National Geographic bought it and has used it to capitalize on the fame of the Da Vinci Code to piggyback its way into the attention of the media. The release right before Easter also seems calculated.
Winds of Change has a succinct article.
Christianity Today also.