I would do some specific things on grid screen that allow update an interval game score on each item of gridScreen object, but I don’t know how custom gridScreen or create new one to support my business requirement like this
No idea what “interval game” is.
You have multiple hacky options - from showing score as breadcrumb (setBreadcrumbText()) through changing list name (setListName()) to changing item description or image.
Btw, Roku*… roGridScreen has undocumented “.setTitle()” method? What’s that for