Let’s not go overboard. This is not “true” gnosticism. It is a “gnosticization” of Christianity, but is not like any traditional form of so-called Gnostic Christianity.
True Gnosticism sees the body as such a prison, death is welcomed.
There is also a demigod that created the Earth, not Yahweh Himself.
There are also Aeons or other powers, sometimes referred to as “principalities”.
Considering the body irrelevant to the End of Days resurrection is barely in the same realm as the beliefs that are typically referred to as Gnostic Christianity. Gnostic Christianity was the underlying reason so many early Christians went willingly to die in the arenas. They were eager for Paradise.
One of the reasons Christian Gnosticism didn’t prevail over the other schools of Christianity is because they were TOO eager to give their life… and the Roman killing machine was quite efficient at granting their wishes.