I recently asked a question at Astronomy.SE related to matter-gravitational waves interactions: https://astronomy.stackexchange.com/q/43265
From related question Do gravitational waves disperse/refract (like EM waves in a prism)?
There is also the fact that matter is transparent to gravitational waves of any frequency.
As the question does not seem to provide any references to this, this raises a few questions: What is the reason for this? Is there any specific research paper or theory that describes why this is?