Here is more on the Gnosticism in these versions from the Dean Burgon site:
"Gnosticism, in all of its varieties, was the most influential heresy faced by the early Church. Not only did the Gnostic corrupt many readings found in the New Testament, but offered their own writings as inspired scriptures, such as the The Gospel of Thomas, The Gospel of Peter, The Gospel of Philip, The Gospel of Judas, The Gospel of the Ebionites, The Gospel of The Twelve, The Gospel According To The Hebrews (also called The Gospel According To Matthew, not to be confused with the real Gospel of Matthew), The Gospel According to the Egyptians, The Gospel of Mary (Magdalene), The Acts of Andrew, The Acts of Peter, The Acts of John, etc.
Gnosticism had a variety of forms and sects, which broadened its base and growth. Historian Will Durant calls Gnosticism "the quest of godlike knowledge (gnosis) through mystic means" (The Story Of Civilization Vol. III, p. 604). Durant is correct. Gnosticism is thinly veiled Pantheism. Pantheism is the doctrine that identifies God with and in the whole universe, every particle, tree, table, animal, and person being are part of GOD. Or, to explain it in a very basic way, the Greek word pan = all. The Greek word theos = God). Therefore it literally means "God is All" and "All is God".
The Gnostics taught that the physical (material) is evil and the spiritual (non-material) is good. Thus, a good god (spiritual) could not have created a physical world, because good can not create evil (that is the spiritual would not create the physical). So the Gnostic god created a being (or a line of beings called aeons) removing himself from direct creation. One of these aeons, or gods, created the world. The so-called Christian Gnostics believed that Jesus was one of these aeons who created the world. Some Gnostic taught that Jesus did not have a physical body. When he walked on the earth, he left not footprints because he never really touched the earth (he being spiritual and the world physical). Others taught that only our spiritual bodies were important, so the physical body could engage in whatever acts they desired because only the spiritual body would be saved. Still other Gnostics taught that the physical body was so evil that it must be denied in order for the spiritual body to gain salvation, thus shunning marriage and certain foods..
The influence of Gnosticism can be seen in some of the heresies of today. For example, many of the teachings stated above are found, in revised form, in the teachings of the Jehovah's Witnesses. To the Jehovah's Witness, Jesus is a created god, not God manifest in the flesh. It is no wonder that the Watchtower's New World Translation changes "God was manifest in the flesh" in 1 and replaces it with "He was made manifest in flesh." In the TR Greek which underlies our King James Bible reads it reads yeov (theos) (God) <2316> efanerwyh (Ephanerothe) (was manifested/revealed) <5319> (5681) en (in) <1722> sarki (sarki) (the flesh) <4561>. However, the Greek text which underlines the NWT has made a change, so it is natural for the Jehovah Witnesses to choose the reading which reflects their false doctrine. What is interesting is that the NIV, NASB, ESV, and perhaps others says "He" instead of "God," thus following part of the Gnostic corruption. Why, because the NWT, NASB, NIV and, ESV have as their base the corrupt Alexandrian text."
"Christian" Gnosticisms Corruptions