Gabrielle Gachet, née Magnenat (born February 17, 1980), is a Swiss ski mountaineer.Gachet was born in Vaulion. In 2011, she married Grégory Gachet. She started ski mountaineering in 1998 and competed first in the Nocturne Morgins race in the same year. She has been member of the national team since 2000.