Here is a little snippit from an AFM I am familliar with:-
When a GPS Only Approach is planned (GPS only in title or GPS
required by operational rules), prior to dispatch, the crew is required to verify that the predictive RAIM at the destination ETA is within the approach criteria. This information (RAIM AVAILABLE), is displayed on the PREDICTIVE RAIM page on the MCDU.
I would suggest if you have any doubts you should see what it says in your AFM.