In 1964, Gray retired from the Women's College Hospital, and a year later, in 1965, she retired from the University of Toronto. Throughout her career, she had published in multiple journals, mostly on the subject of
gastrointestinal tract surgery, and co-wrote a chapter on colon surgery for one of
Warren Henry Cole's surgery textbooks. After her retirement, she continued her involvement in science, becoming a fellow and member of several more organizations. Gray's obituary in the
Canadian Medical Association Journal describes her as "dynamic, cheerful, and forthright with a great sense of realism and self-discipline", and states that these attributes helped her cope with a long illness that eventually led to her death on October 16, 1978, at the
Women's College Hospital. After her death, parties connected to Gray set up a memorial fund in her name, which would help fund the creation of the Jessie Gray Colorectal Unit for early detection of
colorectal cancer, located at her longtime workplace. == Awards, recognitions, and memberships ==