At the time of its publication (1953), his first work, Les Fiancées sont froides, was hailed by Albert Béguin, André Breton, and Julien Gracq.
Plotting a fugitive hussar in the time of the Napoleonic wars, it is set on the shores of the Baltic Sea and is not without evoking Le Coup de Grâce (1939) by Marguerite Yourcenar.
Guy Dupré joined the publishing house Plon, which has long specialized in military memorabilia.
Close to novelist Jean Parvulesco [fr], he wrote the preface for his L'Étoile de l'Empire invisible (Guy Trédaniel, 1994).
In 2003, Guy Dupré was awarded the Grand Prix de Littérature Henri Gal of the Académie française for Dis-moi qui tu hantes, and his life achievement.