Who is Yahweh in Gnosticism?

Could you please elaborate on the role and significance of Yahweh in the context of Gnosticism? How is he perceived and understood within this philosophical and religious tradition? Are there any specific teachings or beliefs related to Yahweh that distinguish Gnosticism from other religious movements? Additionally, how does the concept of Yahweh intersect with the dualistic worldview that is often associated with Gnosticism?