It's French for "grey" if you are talking about more than one thing.
"baleines grises"
clams and shrimp -> palourdes et crevettes grises
Les Âmes grises was created in 2005.
Mar de Grises was created in 2000.
The cast of Grises - 2008 includes: Moyra Agrelo Federico Salvat
The word gray is gris, or grise (feminine) or grises (feminine plural).Gris is pronounced (gree).
The cast of Nubes grises - 2013 includes: Nerea Barrios Javier Fardon Julio Flores Alexandra Nicod Rickenbacher David Tortosa
deux étoiles grises
deux souris grises
Mères Elizabeth Bruyère and Marcelle Mallet are respectively the founders of the Soeurs de la Charité d'Ottawa and of Québec in 1840 and 1845 (Soeurs Grises de la Croix, Soeurs Grises de Québec), offsprings of the Soeurs (Grises) de la Charité de Montréal founded by Saint Marguerite d'Youville in 1737.
Julio Carbajal has written: 'Los grises'
tres gatos grises