No I made the gallery use the collection:
And then add the checkbox into the gallery.
If choose the row's checkbox it will show the row's country's name.
It isn't clear to me what you are trying to do. What does the gallery show if you don't Check the box? Are you using it to Unhide a label? @mr-dang had an elegant solution for hiding and displaying a gallery item. Check out https://powerusers.microsoft.com/t5/General-Discussion/UpdateContext-and-Visibility/m-p/192688 and see if that is what you are looking for.