There isn’t one, really.
There’s nothing wrong with the catholicos gospels; it’s just good to have more. Athanasius wasn’t divine; Jesus was.
Are you implying that this is considered a canonical gospel by the Catholic Church?
If so, you a terribly mistaken. The Church rejected this, and the other works shown on the site you pulled this from, many, many moons ago.
So it is not "good to have more" writings. This stuff is not Christianity; to insist otherwise is to hopelessly garble the message. Dig deeper. Don't settle for being a mere controvertialist. If you think Jesus was divine, then investigate the criteria for authentic Scripture that the early Church demanded. When you do, you will run away from the idea that the "Gospel of Mary Magdalene" is anything other than a book written by people who sought to parallel Christianity, but who were definitely confused enough to be outside the fold entirely.
“Theres nothing wrong with the catholicos gospels; its just good to have more.”
Even the Catholics deny the Gnostic gospels. You have no point but division.
You’re kidding, right? You really believe this gospel was authored by apostolic authority of those who knew Jesus? Do you have any idea what the name “gnostic” refers to?