Gabriel was born and raised in Toronto, Canada. He is currently Third Horn of the Toronto Symphony Orchestra, a position he has held since 2002.

Over the course of his career, Gabriel has played with many orchestras, including several guest appearances and Carnegie Hall performances with the Boston Symphony Orchestra and Les Violons du Roy. He has also played with the Winnipeg Symphony Orchestra, the National Arts Centre Orchestra, the Kirov Orchestra, and l’Orchestre Symphonique de Québec. He frequently records for movies, TV shows and commercials such as Hockey Night in Canada, the Olympics, Murdoch Mysteries, and the feature film Burn Your Maps.

Gabriel recently joined the Boston Symphony Orchestra for performances in Boston, at Tanglewood, and on tours to Japan and to the finest concert halls of Europe.

Gabriel often plays the great chamber works written for Horn. Recently he has worked with artists such as André Laplante, Jonathan Crow, David Louie, Frank Morelli, Joaquin Valdepeñas, the Penderecki String Quartet, James Campbell, and many others.

Gabriel is a devoted teacher. He teaches a full studio of students at the University of Toronto and the Glenn Gould School at the Royal Conservatory. He is a faculty member of NYO Canada and spent several years teaching at the Banff Centre. Gabriel was honoured to adjudicate auditions for the first-ever YouTube Symphony Orchestra.

In 2012, he was awarded the Queen Elizabeth II Diamond Jubilee Medal for his work fundraising, mentoring, coaching and teaching at the NYO Canada.