She co-directed with David Fulton the documentaries "Years of Struggle" (1975), "The Horsemen" (1977), "The Cry of the Gull" (1977), and "Crisis in the Rain" (1981).
[1] As of 1973, Montero was the Executive-secretary of the Canadian Committee for a Democratic Spain,[3] and as of 1975, its President.
Her book The Immigrants (1977) included pieces of interviews with over 400 people, talking about their experiences.
[2] The same year, she hosted a series for CBC Radio called The Music of Spain.
[5] The Archives of Ontario has preserved four of her documentary films in its holdings as the Gloria Montero and David Fulton fonds (F 4368, 1975-1984).