I never know what people expect when they speak of opening gateways of consciousness. Presumably, mandalas opening and exotic music playing as Ganesha comes down and offers a benediction on your foreheads or something, and an inexplicable desire afterwards to have a really big curry.
I've had my consciousness expanded - and when I came out of the sweatlodge, I didn't feel particularly grateful or enlightened, or want to dance with spirits. I didn't actually see anything that wasn't supposed to be there. There was a dead bird at my feet, actually. Headless. A cat had just killed it. I did enjoy having the rain pour on my face, though, and I became aware of one thing which has stuck with me all this time.
Life is pain. If you're suffering, you are alive. The moment you stop suffering, that's it. That's death. Failure of your survival roll.
And some people not only seem to enjoy pain - they only seem to come alive when there is pain, almost as if they grow strong from their own pain.
I did wonder whether that is what enlightenment is about - to suffer is to know that you're alive. But beyond that, no Ganesha.
Bob Pirsig said it best - "The only Zen that you'll find on top of the mountain is the Zen you bring with you."