prior posts, many kosher for Passover products are made gluten free. Also sometimes labeled as non gebrokts, those products are prepared without wheat, barley, spelt, oats and rye for religious reasons. New items are introduced every year, and some - like Shabtai Gourmet, whose gluten-free cakes and cookies at one time were made only for the holiday - satisfy demand all year long.
The matzo-style squares will be a new option for the holiday, and should make for a much less expensive option than the gluten-free oat matzos that have been available for Passover the last few years. The crackers are made with tapioca starch, water, potato starch, potato flour, expeller-pressed palm oil, natural vinegar, egg yolks, honey and salt.
The best bet for finding these products is in the kosher section of your local supermarket. If the store carries other Gefen products, chances are the manager can order these for you upon request.