The importance of the Gospel of Judas is the light it sheds on second-century Sethian gnosticism and its theogonic mythology. And indirectly, it adds to our ability to assess the rheotorical strategies of the (orthodox) apologists in the way they represented the views of the "heretics". It doesn't tell us anything about first-century AD Christianity (although I am interested in the possibility that the Sethian origin myth has its origins in first-century Samaritanism, but there is no proof of that), much less anything about Jesus or the "historical" Judas.
The Gospel of Judas- The Hidden Story of the Betrayal of Christ
I read somewhere that the story of Judas evolved over time, borrowing from hints and stories from the OT.
The story of his suicide and the potters field are pre-echoed in other writings.
hamsterbait....Try here for the lowdown: http://www.jehovahs-witness.net/watchtower/bible/116729/1/The-Evolution-of-Judas-Iscariot
It's just another late gnostic fiction.
They are all fictions. The books labeled as the Gospels of Matthew, Mark, Luke, and John are late fictions.