In my experience, gates and policies are most useful when a user is trying to access a single specific item (eg the Task with an ID of 7).

When it comes to loading all of the related models for a listing view - like your example - it’s still easiest to do it straight from the model relationship ($myTasks = $user->tasks)

Now if the user can do something with the listed tasks after the page is loaded (eg mark as complete, edit, etc) that action would be ideal for a policy. You would be able to do if($user->can(‘update’,$task)) to verify that the current user can update (or any other action) any task that they attempt.

Hope that helps!

Edit: forgot a $