I haven't heard that there is a particular blood type associated with gluten intolerance.
I have heard that gluten intolerance (celiac disease) is often classified as an auto-immune disorder. That is, the body starts attacking its own cells (often in the small intestine, resulting in nutritional imbalances). The symptoms can appear at any time in one's life, and the symptoms can be so varied that many doctors don't think that it is appropriate to check for celiac.
I have not heard of any cure. If it were simply a matter of a missing enzyme, such as for people with milk intolerances who lack lactase, then we would see a product or prescription for the missing enzyme. But it ain't that simple, unfortunately.
I do fine as long as I maintain a strict gluten-free diet.