The painter and muralist, Guy Montpetit was born in 1938 in Montreal. He is quickly immersed in the visual arts thanks to his elder brother Roland Montpetit, landscape architect. In 1961, Montpetit obtained his Bachelor of Fine Arts from the Montreal School of Fine Arts during his academic training. He was influenced by the legacy left by the painter Paul-Emile Borduas. He continued his studies at the Atelier 17 in Paris for a period of two years.
The painter Montpetit has always sought to render art to the greatest number and not only to be reserved for the elite. He has worked on the development of large-scale public art murals in the Quebec landscape throughout his career. Among his great achievements, there will be the mural of the West wing of the CBC building in 1972, a building that was newly built at the time. During the following year, from 1972 to 1973, Guy Montpetit created a tryptic mural in the ventilation tower of the Ville-Marie Expressway. These achievements are possible at the time thanks to his partnership with the firm Domtar, which, following research and development provided him especially for his creations of high-rolling laminated materials.
In the early 1970s, the artist Montpetit worked with the architectural firm Duplessis-Labelle to develop the 1 per cent (1 per cent) law for integrating art into architecture. It is with this same firm that Guy Montpetit realizes the L'Assomption metro station in 1974 and 75. Fresco made in the arbortite that allows easy maintenance and in any practical end unalterable. In 1976, he participated in the exhibition Corridart and realized the chapel of Ste-Clotilde in the St-Henri district of Montreal.
Guy Montpetit has worked with children with hearing loss and develops imagery language that can be applied to very large surfaces and that allow these children to express their emotions. Since 1973, the artist lives in the Laurentians. He is the uncle of the artist Richard Montpetit.