They do not have such an entitlement: https://grapheneos.org/faq#hardware-identifiers (edit: and also: https://grapheneos.org/usage#wifi-privacy )

And the only app that has access to GPS on my device is: https://organicmaps.app/

And Googling "where am I" indeed shows me at my VPN exit [with my always-on and enforced VPN].