I saw the large gargoyles you are referring to in a photo on another thread about Target 75% sales. I remember seeing those guys as well as the stone giant vulture and the gargoyle spitting fountain in the Garden Department. They seem to be of a stone cast material and are very heavy. If you are thinking of putting the gargoyle on top of a column people would walk past, I'd be concerned that they would fall and hurt someone. Better placed on or near the ground.