[deleted] Hi, this answer is hard to answer definitively as it depends a lot on your threat model.
I can, however, give you some information on location access on GrapheneOS that might help you make an informed decision.
Apps can only access your location when you explicitly give it the location permission. This permission is given on a per-app basis. When apps request for your location a green indicator dot will appear on the top right corner of the screen. More info about the indicator can be found here.