If any other works had an argument to be part of the canon it would have to be "The epistle of St. Clement to the Corinthians" or "The Didache". Both date in the late first century (probably within the lifetime of John) and were widely read in early christian churches. Both are widely attested in the works the early church fathers from at least the early second century. But even these were never accepted as canonical, again, due to uncertainty of authorship and whether the author had a first person relationship with Jesus or an Apostle; which was generally considered an absolute necessity to be considered as scripture. (Paul is considered an apostle in this regard.)
If even these works were never taken seriously as part of the bible then the Gnostic gospels aren't even in the same universe as to be considered. The cannon of the bible was dictated by the holy spirit and sealed by the church. You can trust your bible as inerrant and sufficient.
Now our FRMormons have a slightly different view of the bible...
The Articles of Faith outline 13 basic points of belief of The Church of Jesus Christ of Latter-day Saints.
The Prophet Joseph Smith first wrote them in a letter to John Wentworth, a newspaper editor,
in response to Mr. Wentworth's request to know what members of the Church believed.
They were subsequently published in Church periodicals.
They are now regarded as scripture and included in the Pearl of Great Price.
THE ARTICLES OF FAITH
OF THE CHURCH OF JESUS CHRIST OF LATTER-DAY SAINTS History of the Church, Vol. 4, pp. 535541
Joseph Smith |
But it STILL gets printed in every Quad that rolls off of the presses.
***There is virtually no reference of them or manuscripts prior to the late second or early third century.***
I have read that one or more of the anti-Christian emperors ordered the destruction of all Christian bibles and scriptures. So, the Christians hid their real scriptures and turned in their fake “gospels” for destruction, but a few of the fakes, such as the Nag Hamidi, must have survived.
After a new emperor came to power, the real scriptures were brought out of hiding. That is the ones in the Bible.