Creating Slow Cooker Greek Chicken Gyros is a straightforward process. Follow these easy steps to prepare this delightful meal:

1. Prepare the Marinade: In a bowl, mix together olive oil, lemon juice, minced garlic, oregano, thyme, cumin, paprika, salt, and black pepper.
2. Marinate the Chicken: Place the chicken thighs in a large resealable bag or a bowl, then pour the marinade over them. Seal the bag or cover the bowl, and refrigerate for at least 30 minutes, or up to overnight for more flavor.
3. Add Ingredients to Slow Cooker: Place the marinated chicken in the slow cooker. Pour in the chicken broth to keep the meat moist during cooking.
4. Cook the Chicken: Cover and cook on low for 6-8 hours or high for 3-4 hours, until the chicken is fully cooked and tender.
5. Shred the Chicken: Once cooked, remove the chicken thighs from the slow cooker and shred them using two forks. Return the shredded chicken to the slow cooker to mix with the remaining juices.
6. Prepare Pita and Toppings: While the chicken is cooking, dice tomatoes, slice cucumbers, and red onion. Set aside with the tzatziki sauce for serving.
7. Assemble Gyros: To serve, layer the shredded chicken in pita bread, topped with diced tomatoes, cucumbers, red onion, and a generous drizzle of tzatziki sauce.
8. Garnish: Add chopped parsley or dill if desired, and enjoy your Slow Cooker Greek Chicken Gyros!