I've been working in a haunted insane asylum. The place has been under construction for the past 3-4 years. It's a new 1 million square foot building on the insane asylum grounds. I don't think I believe in ghosts, but now that construction has come to an end, weird stuff has been happening that I cannot explain. Locked doors that require a key or RFID badge to unlock, unlocking and opening by themselves, doors with automatic hydraulic door closers holding themselves open, lights turning on and off by themselves, footsteps, disembodied voices, strange sounds, strange shadows/shapes showing up on CCTV feeds, and inanimate objects moving by themselves. All my coworkers have had something happen to them there they can't explain. All the activity started up about 2-3 months ago once construction finished.
As for Gnosticism's influence on the pajeet religion, I doubt there was much, certainly not for the positive. Hinduism is the result of religious compromise, as I said, its an utter abomination and only maintains the utter worst parts of its component faiths. Of course, the jews probably love Hinduism, because they want an all encompassing world religion that sees them as gods and mitigates the role of the Creator.
Though I know for a fact there were forms of it mixed with actual Aryan Zoroastrian mythology (Manichaeism) and other more debased forms, particularly the Antinomian sects of Syria.