In 1919, he resumed his teaching activities in Lyon and Paris. In 1926 he was appointed director of the Museum of Islamic Art, a position he held until 1951.[2] He wrote 14 of the 35 volumes of the catalog of the museum, of which he did much to enrich the collections, particularly in the areas of items of furniture and epigraphy.
On his return to France in 1951, Wiet was appointed professor at the Collège de France (chair of Arabic language and literature), a position he held until 1959. In 1957, he was elected a member of the Académie des Inscriptions et Belles-Lettres.
1931: Répertoire chronologique d'épigraphie arabe, founded by Étienne Combe, Jean Sauvaget and Gaston Wiet, Cairo, Institut français d'archéologie orientale.
L'Égypte arabe, de la conquête arabe à la conquête ottomane (642–1517), Paris, Société d'histoire nationale, 1937.
1937: Le livre des pays (Kitâb al-Bouldân) by Ya'qûbî, presentation and translation by Gaston Wiet, Cairo, Institut français d'archéologie orientale.
1942: Mémoires sur l'Égypte, année 1791, Trécourt, Jean-Baptiste, edited and annotated by Gaston Wiet, Cairo, Institut Français d'Archéologie Orientale.
1952: Leçon inaugurale faite le 4 décembre 1951, Collège de France, chaire de langue et littérature arabes, Paris, Collège de France.
1955: Ibn Iyâs, Muḥammad ibn Ahmad, Journal d'un bourgeois du Caire, chronique d'Ibn Iyâs, translated and annotated by Gaston Wiet, Paris, S.E.V.P.E.N., (Bibliothèque générale de l'École pratique des hautes études).
1959: Le minaret de Djâm : la découverte de la capitale des sultans ghorîdes : XIIe-XIIIe, with André Maricq, (foreword by Daniel Schlumberger), Paris, Klincksieck, (Mémoires de la Délégation archéologique française en Afghanistan, XVI).
1964–1965: La configuration de la terre (Kitab Surat al-Ard) by Ibn Hauqal, translations and notes by Gaston Wiet and J.H. Kramers, Paris, Maisonneuve et Larose, 2 vol.
^Digital archive of civil registry of Paris, birth certificate N°2/1334/1887,date and place of death mentioned in the margin of the act.
^After the Republican coup, Gaston Wiet, who was, somehow, a senior "officer" of the Egyptian monarchy, was invited, with discretion, to leave office by the new authorities.