SAP GRC 12 upgrade to S/4HANA

Dear experts,

We're running our SAP GRC system on NW 7.52 version and would like to upgrade it to S/4HANA with S4/HANA AC,RM,PC add-on components. When I checked this option in maintenance planner I can see that would be possible, but this way our old AC,RM, PC components would still stay on the system? How would migration from old components be done?

Thank you,

Stefan