To make this Tater Tot Casserole gluten-free. Ensure that all your ingredients. Are certified gluten-free. Use a gluten-free cream of celery soup (you can find these in the gluten-free section of most grocery stores. Or make your own. With gluten-free ingredients). Additionally, check that your Worcestershire sauce is gluten-free. As some brands contain gluten. Finally, ensure your tater tots. Are gluten-free. Most are. But it's always good. To double-check the label. This will allow everyone. Including those with gluten sensitivities. To enjoy this delicious dish. Without worry.