Proper use of the term gargoyle being the statues that drain water from buildings.
By the 13th century, those figures were being called gargoyles, a name that came to Middle English from the Old French word gargoule. The stone beasts likely earned that name because of the water that gargled out of their throats and mouths; the word gargoule is imitative in origin
I could never remember which was Gargoyle and which was Grotesque so this will help.