This is more the opinion of the researcher than an objective description of the document from a Christian perspective. I don't see anything Gnostic about it.
The Christian perspective should be the perspective we see in the Bible, in this case the New Testament. We see no such thing as the wearing of amulet magic “charms” in the New Testament.
Many New Age mystic types extrapolate the practices from later times applying them to the time of original Christianity.
As to the Gnostics, you might try reading the Nag Hammadi writings. Since you seem so defensive of these Egyptian Gnostic Christians, maybe you think Gnostics get a bad rap?
Christians wearing amulets, “magic charms
When does an object become a “magic charm”? Does a cross on a chain around my neck make it a Charm?
I don’t see anything Gnostic either. I don’t know of any Christian practice of wearing charms so I can’t tell where the researcher is getting this idea and it’s clearly one she’s promoting and the fact that she says, “that the fragment is also an example of Christianity and the Bible becoming meaningful to ordinary people, not just the priests and the elite” strongly suggests what she knows about ancient Christian practices is suspect.