I did think from all the apostles Judas would be one who was compelled more to leave a gospel,
but its not hard to see why it was omitted from any final edit of the New T.
Not really sure if Judas could have left a gospel... After all he (reportedly) hanged himself immediately following Jesus' execution... Didn't leave much time for jotting down notes... Especially when you consider that the gospels of the other apostles were actually written down years afterward... I don't think I've ever read of any one of the apostles following Jesus around with a roll of parchment and a quill - though I could be wrong... However that's not to say that someone didn't remember Judas' words and actions and ghost write it for him after the fact...