The Milky Way Galaxy Could Be an Effect Gravitational Wave Detector

I don't know how detectors like ligo measure gravitational waves are unner the mechanism, but objects in our galaxy are quite spread out. So i don't think our galaxy could be an effect gravitational wave detector. You can just look at the milky way galaxy and see if, if things get squished in one direction relative to another for supermassive gravitational waves. We just have to observe how gravitational waves are affecting all the bodies in the galaxy.