That's a pipe dream.
Even your source admits that the Passion Narrative of the canonical Gospels dates from 30-60 AD and that narrative account gives the lie to this Judas text.
The very first mention of the Judas text is from 180 AD. That's a 100 year differential at best, if we assume that Irenaeus was not responding to a very current cult.
Indicating it existed well before 180, since Ireneaus was inveighing against a text which had some currency among the Gnostics.
My point is, regardless of date, the simple fact that this is a known writing from a known Gnostic Cainites' sect --- who thought the tempter serpent was good guy --- completely discredits this fake "gospel."
An old lie is still a lie.