Rouge Baiser, 1948
Le bas Scandale, 1950
Les Bas Christian Dior, 1952
Miss Dior, 1959
Eau Sauvage, 1978
Gruau's artistic talent in fashion illustration merited him publication at the age of 14 and by the time he reached 18, he was published internationally, in the US, Italy, and France. In his lifetime, Gruau worked for numerous magazines including Marie-Claire, Femina, Elle, Vogue, Harper's Bazaar, Flair, L'Officiel, and Madame Figaro, and L'Officiel de la Couture.
Gruau was hired by major designers like Pierre Balmain, Christian Dior, Jacques Fath, Balenciaga, Elsa Schiaparelli, Rochas, Lanvin, Elizabeth Arden, and Hubert de Givenchy. Gruau gave life to their haute couture clothing and expanded their popularity with his captivating illustrations.
Gruau, whose posters often echoed both classical Japanese drawings and Toulouse-Lautrec's sketches of fin de siècle Paris night life, was even best known for creating the marketing images for Miss Dior perfume and for Rouge Baiser lipstick. According to Alan Riding of the New York Times, "everything he did, he evoked the glamour and style of the world of high fashion".
Gruau's pictures were the advertisements of the time and gave marketing and presentation of clothing a new brilliant flare.
Gruau's first position as artistic director for advertising was in 1947 with Christian Dior. The two together formed the "New Look" of the time, partially a result of Dior's designs, and partially a result of Gruau's combined interpretation and upgrading of old-style graphic illustration. Gruau formed a friendship with Dior that contributed to their successful collaboration and further enlargement of fashion advertisement, which a primary reason he is mostly remembered for his work with Dior.
Gruau moved to the United States in 1948 to work for Vogue and Harper's Bazaar.