GarfGlider unfortunately, I don't think so. The synchronized vibrations from the stock PixelOS worked for a long time (you only had to copy over the original ringtone files), but a while ago the Google Tones app (all 3rd party ringtone pickers) stopped working on GrapheneOS due to a change in AOSP.
I think it should be possible to make it work again by whitelisting the package name, but this will not be something the project will prioritize, since it has nothing to do with security or privacy.