I have Multiple Sclerosis and because of muscle weakness I was also diagnosed with GP. I had recently had a Laproscopic Pyelormyotomy and am now doing fine. I also have a lot of other Autoimmune diseases as well such as Lupus and Sacoidosis and more. Autoimmune diseases can cause all kinds of Gastrointestinal problems so be sure to get your ANA blood checked for any kind of Autoimmune activity that your Doctor may be un aware of. I also had the Nissen Fundolpcation as well. Best wishes to all!!