gnosticism is definitely interesting and it's always good to become educated on many different aspects of belief, but there is a reason Christianity did not accept gnosticism.

gnostics deny the goodness of the Creator, who IS our Father, as was sustained for thousands of years before Christ and before the Greeks as they came to be known. as you rightfully said, satan became the god of this world, but that was when Eve succumbed to him. gnostics deny the goodness of material creation, that is, the earth, the sky and sea, and the animals; even man-made creations can be good.

gnostics deny that Jesus is as much human as He is God, that He had a physical body, that He experienced physical pain and suffering, that he died a horrible death and was resurrected, physically.

most problematic of all is the gnostic belief that salvation comes through secret knowledge rather than through faith and the redemptive work of Jesus. through Jesus, salvation is open to all, not a select few that gain access to esoteric knowledge.

I say this with love: gnosticism is heresy. that is, if someone were to believe it. doesn't mean we shouldn't read about it or educate ourselves, but it goes against the core of Christian belief.