In 1904, Gullan established a "School of Elocution" at 534
Sauchiehall Street, which went on to be successful. forming the first verse ever speaking choir, the Glasgow Nightingales, in Glasgow around 1922. Gullan encouraged the inclusion of speech courses as part the curriculum in schools and teacher training institutions. She was President of the Speech Fellowship, an association founded to promote these goals. From 1926 to 1938, Gullan taught speech training and voice production to teachers at the
London Day Training College (now the UCL Institute of Education). In London, Gullan became Head of the Department of Speech Training and Dramatic Art at
Regent Street Polytechnic. In 1932, with Clarissa Graves, she opened the Speech Institute, where courses included choral speaking and puppetry. The trend for verse speaking spread to America, where Gullan undertook tours and gave lectures. Shortly before the formal declaration of
World War II, Gullan volunteered as a director in a relocation center in
Kettering, where she was responsible for the care and education of over 200 children from London's poorest districts. Gullan was also the author of eight textbooks and anthologies, and the sponsor sponsor the journal
Good Speech (later
Speech News). In 1952, Gullan was made an
MBE, for her achievements in establishing speech training in schools and renewed interest in choral speaking. Facing declining enrolments as many schools established their own voice training courses, the Speech Institute closed in 1953. == Death and legacy ==