One Radio button inside a Gallery Item: how to select the item or not?

[Finnair]

I have a Gallery in canvas app and one Radio button inside the Gallery Item.

I need a very simple function: Gallery Item to be selected or not in the Gallery, and only one can be selected at a time.

Besides, my Gallery Item is a GroupBy formed group, let say IncGroup.

What should be the functions in Radio button?

[Finnair]

I think I need to use checkbox instead?

[EdViegas]

Sorry.. mistake thread