Mary Gibson was well known as a raconteur, and hosted parties for her friends of many nationalities at her Paris studio. According to an article in The Scotsman in 1977, she was "a cornerstone of the Scots community and a causeway into the French one." She died on 5 March 1989 at L'Hôpital Broca in Paris. A memorial service was held for her at the Scots Kirk in Paris on 6 April 1989.
