Gilbert Trausch attended the Lycée de garçons Luxembourg, where he was influenced by Tony Bourg, and finished school in 1950.
In 1956, he then taught French and History at the Lycée de garçons, the same secondary school as Margue, and later received the title of professeur in 1959.
In 1982 he became the Luxembourgish representative at the European Commission's Liaison group of professors of contemporary history.
At the official celebration on 18 April 1989, he was the only one to speak alongside Jacques Santer and Javier Pérez de Cuéllar.
In 2005 Trausch campaigned for a Yes vote in the Luxembourgish referendum on the European Constitution.