Actually I do. And I don't think the ancient Gnostics would disagree with me. But even if they don't it doesn't change anything. They are still powerful spiritual forces.
What is the basis for your statement "Gnosticism is all about metaphor and non-literal interpretation"?
Gnostics were among the first theologians to take parts of the Bible metaphorically. Notice how Genesis is interpreted in a highly innovative way in the gnostic creation myths. Gnostics did not reject Genesis - they took it to mean something very unorthodox.