 In 1933, he played Touchstone in a production of "As You Like It" in the Open Air Theatre, Regent's Park.Also in 1933, he wrote a memoir called "G. G."

According to musical theatre writer Andrew Lamb, Grossmith 

The Wodehouse scholar Norman Murphy believes that Grossmith was the inspiration for Bertie Wooster.Grossmith died in a London nursing home at the age of 61.