I like the Gwave suggestion! There’s already been a bit of debate over whether they can appropriately be called “gravity waves,” (see e.g. https://www.sciencenews.org/blog/context/gravity-waves-ok-way-refer-gravitational-radiation), which are really something totally different (think deep ocean waves). While it’s safe to say that gravitational waves and gravity waves are unlikely to be confused in context, we shouldn’t purposefully mix up the terminology.