After a short period in art school, Guibert found work as an illustrator and storyboarder. He began Brune, an album retracing the rise of Nazism in Germany in the 1930s. Brune was published in 1992, after seven years of work.
In 1999, he began the series Ariol, written by Marc Boutavant, which originated in the children's magazine J'aime lire. Ariol has been collected into seventeen volumes, eleven of which have been translated into English by Papercutz.[2] A French-Canadian series of animated shorts of the same title were also produced.
The first example was La Guerre d'Alan ("Alan's War"), which was serialized in Lapin in 2000; it recounts the memories of Alan Ingram Cope, an American soldier from World War II living in France. This was followed by Le Photographe ("The Photographer"), the story of Didier Lefèvre, a French photojournalist who accompanied a Médecins Sans Frontières mission during the height of the Soviet–Afghan War in 1986.[4]The Photographer sold 250,000 copies in France and won the Essentials of Angoulême award in 2007. It has been translated from the original French into 11 languages; the American edition won the Eisner Award for Best U.S. Edition of International Material in 2010.
During this same period, he created several series, including Sardine de l'espace, Les Olives noirs, and La Fille du professeur ("The Professor's Daughter") (with Joann Sfar).
After being a finalist for the Grand Prix de la ville d'Angoulême in 2019, he was finally elected by the authors during the festival the following year.[7] The Grand Prix is considered the most prestigious award in Franco-Belgian comics.
In 2020, he became the first comic book author to whom the Académie des Beaux-Arts dedicated an exhibition.[8]
In January 2023, Gubert was elected member of the engraving and drawing section of the Academy of Fine Arts. He occupies the chair of Pierre-Yves Trémois, who died in 2020.[9]
Tom-Tom et Nana vol. 33 : Ben ça alors ! (story), with Bernadette Després (art) (Bayard/Bayard Poche, 2005)
Va et vient (L'Association, 2005)
Des nouvelles d'Alain: première partie (story and art in collaboration with photographer Alain Keler and Frédéric Lemercier), in revue XXI (Vingt et un) #8, autumn 2009