SAP standard functionality of GOS integration can be used to display reported checklists in transactions IW32/IW33.
Prerequisites
Maintain table SGOSATTR via transaction SM30 and create an entry with class /PACG/ECM_CL_GOS_SERVICE_CL:
Result
Once the setting above has been made, a new menu option «Checklist» will be available under the GOS-menu for service order. It will be active in transactions IW32/IW33 if a checklist was created for a specific service order: