There is another story with similar spin to the gospel of Judas. It is taught in public schools today and I personally was exposed to it mulitple times throughout gradeschool. Instead of targeting the gospels though, it targets Genesis. Instead of the serpent being evil he is the savior of man against a capricious god who witholds special knowledge from mankind.
Know what I'm talking about? It's a Greek myth. The myth of Prometheus, who steals fire from Zeus to give to man. It's a spin on the Genesis creation story so that the good and bad guys are reversed, shedding a good light on the serpent.
The essence of Gnosticism. Essentially, God is evil in their view. The other gnostic gospels (Thomas is the most famous) are similar.
The gnostics attached their previously-held view to Christianity when it benefitted them and tried to confuse the issue.
What is frustrating is that every few years, people re-discover these things and think they have discovered some sort of secret knowledge.