Thank you for a very interesting exchange. I think that “gnosis” is not particularly religious, for instance, “gnoseology” which means a philosophy of knowledge or epistemology. “Gnosticism” can be both philosophical and theological, in the sense of beliefs that devalue or denigrate the material world in favor of some concept of divine knowledge, often considered as secret knowledge. Böhme is an interesting and influential fellow, in terms of Lutheranism yes a heretic for his version of the trinity, but I wouldn’t call him a gnostic Christian per se.
I don’t believe that gnostics go to hell or any nonsense like that, but that the tendency to want to escape the world and its material reality, if indulged, has a serious impact on the transmission of the Gospel, and results in a stunted faith and so deficient action in the world.