I don't know this doctor but Gerson therapy is based on amusing the patient while Nature provides a cure.
Amongst the things I first looked into when I (finally) got a diagnosis was a good juicer.
I eventually decided on an Omega rather than the pricy Norwalk because I did not yet know if I would continue with the life style change. Keeping the Norwalk clean and ready is a job. There is also a job with the Omega but not quite as big of a one.
You can check Max Gerson's or his daughter's books online or at the library. There are several therapy centers which incorporate Gerson's teachings. I don't know where you are but there is a Wellness center in Sedona, AZ and Hippocrates Health Institute in WPB, FL and Optimum Wellness in San Diego and Austin and Living Health Institute in Atlanta, GA.
You can do it at home but you need help from your family and friends. Here is a page from somebody's blog who says she helped a friend who used the Gerson Therapy successfully: