In 1967, together with the French architect Adrien Fainsilber, Högna Sigurðardóttir won the first prize for designing a large-scale university development at Villetaneuse in the northern suburbs of Paris.
Gailhoustet's works are to be found mainly in the Paris suburbs, first and foremost at Ivry-sur-Seine and Aubervilliers, but also in Saint-Denis (renovation of the Ilot Basilique, 1981–1985), Villejuif, Romainville and Villetaneuse.
The Gare d'Épinay-sur-Seine (Épinay-sur-Seine station) is one of the two railway stations in the commune of Épinay-sur-Seine, Seine-Saint-Denis department, France (the other being the Gare d'Épinay-Villetaneuse).