Her father having been killed during the resistance to the German occupation, Georgette London lived in close intimacy with her mother, a journalist. They traveled all over Europe, visiting museums and exhibitions. In Paris, Georgette accompanied her mother to literary salons and art galleries. In 1937, she became a student of Jean Jaudon at the École des Beaux-Arts, while attending the École du Louvre. She realized in 1938 that it was André Lhote's teaching that suited her own sensibilities. In 1939, while attending the Académies libres de Montparnasse, she began to paint in the entourage of the group de l'Échelle, at the Académie de la Grande Chaumière in the workshop of Othon Friesz, with Michel Patrix, Cortot, Busse. Married in 1945 with an American, she then left for the United States in 1946, living in Cincinnati, Cleveland, New York until 1978, and then San Francisco.

She participated in group exhibitions in Paris : 1952 Salon des Indépendants ; 1954 and 1955 Musée d'Art Moderne de la Ville de Paris ; 1956, Union of Women Painters and Sculptors, then later, the Biennale des Femmes Contemporaines, at the Salon des Femmes Peintres et Sculpteurs in Paris. She also exhibited in the United States : 1958 Museum of Art in Cleveland ; 1957 Cincinnati Museum of Modern Art ; 1959 New York Museum of Modern Art ; 1970, 1973, 1976 George Wiener Gallery in New York ; 1990 Bay Model Center in Sausalito.

She has had numerous personal exhibitions : in Paris, Poirier gallery ; then, in 1992, Stanford University, in 1993 the American Institute of Architects of Oakland organized solo exhibitions of her paintings and other works.

In her early years of figurative painting, then influenced by the dominant cubism, she showed very personal colorist qualities, daring to use strange mixtures, orange-green for example. In the continuation of her evolution, practicing a kind of landscaping close to lyrical abstraction, she arranges well-defined colored forms, structured by a network of main lines, suggesting a tectonic movement.