Judas betraying Jesus need not give birth to a new Gospel. The meaning of Gospel is Good News. The Birth,teachings,life, death and the resurrection of Jesus constitute the real one unique true Gospel and there is no necessity prevailing for another Gospel to surpass the genuine one. Further, Jesus knew for what He was in this world and was determined to give up His life for mankind. Though Judas was in a way instrumental in the divine plan of God, it does not qualify him to be the founder of another gospel I believe.
