So we are litearaly at square 0 still here?
https://www.pnas.org/content/112/24/7426
PS: you need to understand how gravity is derived to manipulate it's propagation. Since the mechanisms are very stable due various reasons, only a very good understanding of many processes will allow you to design an experiment that works. I have adopted a very fringe physics model that is unified and explains more using less assumptions. From this perspective I can tell you that contemporary physics is so far from understanding, that most likely we will not see anything in this direction, before we fully trashed our planet.
Never could have come up with such a brilliant theory, took me a year to understand it. Now I understand 137 ^^