It's kinda true, but less exciting than the person made it sound.
gargoyle (n.)
"grotesque carved waterspout," connected to the gutter of a building to throw down water clear of the wall ... from Old French gargole
gargle (v.)
1520s, from French gargouiller "to gurgle, bubble" (14c.), from Old French gargole "throat, waterspout"
https://www.youtube.com/watch?v=YWdD206eSv0