It extended on 1 January 2017 by merging with former communes of La Chapelle-Gaceline and Glénac.

[4] La Gacilly is best known as the location of worldwide cosmetics company Yves Rocher.

[5] The Yves Rocher La Gacilly Botanical Garden is located in the commune and is accessible to the public.

The "Festival Photo de La Gacilly" is an annual event usually taking place since 2004 between the months of June and October, during which some streets and the Botanical Garden are decorated with photographies from professionals from all over the world.

[6] Inhabitants of La Gacilly are called in French Gaciliens.