I experienced my first two Bufo sessions through Dr Gerry but since that time I've heard some less than savoury things about his conduct from multiple sources. I think the front he puts out may be different to the person he is. Beware claims made about the Bufo Alvarius Foundation, it seems there is not much evidence money is going into such a venture, unfortunately.
If you want to read more, the pinned post in the facebook group "BEWARE of the Bufo Gangsters" may be of interest.