To give you a little more information about what you asked, David, I would say that I did a Google search right after posting my message. It seems that the Gospel of Judah is not a hoax, or if it is, it is a hoax as old as the scrolls discovered in the 1970s.
Hello again Pierre, the Gospel of Judas, which we believe dates back to the middle of the 2nd Century (in part because one of the Early Church Fathers refers to it once), is Gnostic (and also pseudepigraphal, meaning that while it is a work that claims to be written by Judas Iscariot, it was actually written by someone else).
So, it could be considered to be a "hoax" on that basis alone, but (as always) there is more, because what it teaches stands in stark contrast with what the Bible teaches us (about Judas and Jesus), both prophetically (OT), as well as what we are taught about him and who he really was in the NT (by the Lord Jesus and the Apostles). This means that either the Gnostic "Gospel of Judas" is a hoax, or the Bible is, because both accounts cannot be correct!!
Here are a couple of short articles that may interest you concerning this:
It's important to remember that none of the historic Christian churches (nor the Jews) consider any of the Gnostic "gospels" to be Holy Scripture (this includes the Gospel of Judas, of course). The thing is, while we (the entirety of the Christian church, that is) spend much of our time arguing, disagreeing and bickering with one another about this point of doctrine or that one, every now and again we actually agree on something and walk together in lockstep concerning it ... as ONE church, that is

... and such is the case with the Gnostic "gospels" (as we have always agreed that they are NOT part of the Holy Scriptures).
In any case, I had always thought that for this gospel to be credible in my eyes, Judah would have had to bear his cross in life, that is, by facing the gaze of the other apostles, and not by fleeing from it in death. Under these conditions, I would have accepted the relevance of this gospel.
That would be another way of arriving at the correct conclusion about the Gospel of Judas, I suppose, but it would also be highly problematic, because if you accept the Gospel of Judas (under certain "conditions", or really, under any "condition") as both true and as Holy Scripture, that would mean that you could no longer accept the Bible as such, because (again) the Bible and the Gospel of Judas do not agree with each other, and both cannot be true.
God bless you!!
--David