The Google Play framework service is very sandboxed on GrapheneOS. Most stuff just works, and - as long as all went to plan, which it seems to - the invasive stuff fails silently or with a harmless error message.
It’s been a better experience than I expected!
For the most part, Google has no idea what apps I’m even installing, beacuse I get free apps without login through Aurora.
For the apps that are important enough to me to purchase through Google Play, Google knows I bought and installed them. But even those are talking to GrapheneOS’ sandboxes Google Services Framework. For the most part, nothing changes in how I use those apps, beacuse the sandboxes framework drops and reports ‘success’ on unsupported framework calls, and the vast majority of apps I have used just move on.
The exception has been anything that only supports Google’s auth layer. I like Google’s auth layer, but I don’t use it anymore. So those apps I can’t use at all. I don’t expect it to work well on GrapheneOS, but I haven’t honestly tried.