Gavin has given talks at the Royal Opera House, the Cheltenham Literature Festival, the National Theatre, the BFI, Southbank Centre, the Oxford Lieder Festival, the Bamberg Biennale, WNO, the CBSO, the LSO, ENO, Garsington, Glyndebourne and the Austrian Cultural Forum.

He has also been invited to give lectures at the British Museum, as part of Germany: Memories of a Nation, the National Gallery, for Facing the Modern: The Portrait in Vienna 1900 and Delacroix and the Rise of Modern Art, the Neue Galerie in New York, the V&A, Tate Britain, Tate Liverpool, the UK Jewish Film Festival and the Freud Museum in London, as well as for the Art Fund and the National Trust.

Gavin is an accredited lecturer for The Arts Society (formerly NADFAS), speaking at societies up and down the United Kingdom, as well as in Spain, Belgium, the Netherlands and New Zealand. He will undertake a tour of Australia in 2022.