Guy Étienne Germain Gaucher, OCD (5 March 1930 – 3 July 2014) was a French Catholic Discalced Carmelite bishop and theologian.
He served as Bishop of Meaux and was an international authority on the life and writings of Thérèse of Lisieux.
Born in Tournan-en-Brie, he was ordained a priest on 17 March 1963 and made his religious profession into the order of Discalced Carmelites on 3 October 1968.
He was named Bishop of Meaux, 27 August 1986, consecrated on 19 October 1986 by the archbishop of Paris, cardinal Jean-Marie Lustiger.
He remained in this post until 1 July 2005 at which time he retired having reached the age limit.