There's a term in Buddhism called "bodhisattva" which is a person who has become enlightened but has vowed not to enter Nirvana until everyone else has done so. I don't know that Dr. Gilbert was a bodhisattva but based on what I have heard from him, he experienced a kundalini awakening at some point earlier in his life and I would imagine that right now he is getting acquainted with a higher density right now.