Spray the inside of a crock pot with olive oil cooking spray (don't skip this step!).
Combine the 1/4 cup gluten-free flour, mustard powder, salt, rosemary, thyme, sage and pepper in a shallow dish, such as a plate. Dip each pork chop in the flour mixture, coating on all sides.
Heat the olive oil in a large skillet over medium-high heat. Brown the pork chops in the olive oil, about 3 to 5 minutes per side.
Remove skillet from heat and transfer pork chops to crock pot. Deglaze the skillet with some of the chicken broth, scraping up any browned bits and pour into the crock pot.
Combine any remaining flour mixture with the remaining chicken broth and pour into crock pot.
Cover and cook on high about 3 hours or on low about 5 hours.
Remove pork chops from crock pot. If you like a thinner gravy, just give it a good stir and serve as is. If you prefer thicker gravy, combine 1 tablespoon gluten-free flour with 1 tablespoon water. Slowly pour this into the liquid in the crock pot while constantly stirring. Heat on high until thickened. Repeat with an additional 1 tablespoon flour and water if gravy is still not thick enough.
Place pork chops on top of a bed of rice, gluten-free pasta or mashed potatoes. Ladle gravy over top, sprinkle with parsley if desired and serve.