To prepare this Pink Cadillac Pasta Salad as a gluten-free dish, substitute the standard elbow macaroni with a certified gluten-free variety made from rice, quinoa, or corn. Ensure that both the Catalina dressing and dill pickle relish are labeled gluten-free, as some brands may contain hidden gluten in additives or thickeners. Always double-check ingredient labels if serving guests with gluten sensitivity or celiac disease.