[2] George, Catherine, Jane, and Denis moved back to Kingston shortly after World War I began.
Gilmour's father, having sailed between the UK and the US, had become enamored with life in New York and applied for US citizenship.
As World War II appeared inevitable and had already produced changes in British society, many were interested in preserving memories of the past before they disappeared.
He trained his artistic technique in Italy and expanded his repertoire, writing plays and producing cine films.
[12] As a member of the Auxiliary Fire Service, Gilmour joined a group of artisans dubbed the Firemen Artists.
After World War II, Gilmour continued to exhibit widely, including at events held by major UK arts organizations.
While he never gained membership to a UK arts organization, he became a foreign member of the Society of French Artists, exhibiting each year at their annual event in Paris from 1950 through 1980.