The gallery on this page is made with a built-in WordPress Gallery Block with square thumbnails…no plugins necessary!
In this example, the thumbnails are linked to a separate “attachment page” that shows the large image view with the Fotomoto Buy Buttons. The Twenty Fifteen theme has a great-looking attachment page template built-in.
If you prefer to display the full-sized image in a lightbox, try the FooBox plugin which looks great and has built-in support for Fotomoto.
