I had written a long reply, but i think i got logged out while typing it because i took too long.
I'll sum up as follows:
The group i was familiar with was called Thelema Press, and they had a website called gnosis-usa.com. They have changed names to Glorian Publishing, and have several websites, most notably gnosticteachings.org. They are based out of NYC, which i live near, and
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Former Cult Members and Affected Families