Active primarily during the 1970s, Gilles Saint-Gilles belongs to a generation of designers shaped by experimentation and the emergence of new industrial materials. Trained at the École Boulle and later at the Beaux-Arts, he developed a rigorous and structured design language rooted in French decorative arts tradition while embracing the technical innovations of his time.

He notably explored Plexiglas and fiberglass, materials emblematic of the decade, valued for their lightness, translucency, and formal flexibility. Through these media, he investigated transparency, diffused light, and sculptural volumes, achieving works that balance technical precision with a distinctly modern aesthetic.

His production reflects a pivotal moment in late 20th-century design, when synthetic materials redefined the vocabulary of form and space.