Absolutely can be done for GIST cancer and most if not all forms of cancer.
The success will come from genomics research and development of new drugs after they find out the abnormality of the genes that cause the cancer and develop new drugs to counteract the problem.
I think immunology research will benefit to all of the cancer patients in the future, a much better approach in long term management in treating cancer.
Please know that my personal opinion is not intended nor implied to be a substitute for professional medical advice. If provided, information are for educational purposes.Consult doctor is a MUST for changing of treatment plans.