In a saucepan, bring the chicken broth to a boil. Add salt and white pepper. Slowly whisk in the stone-ground grits. Reduce heat to low, cover, and simmer for about 20-25 minutes, stirring occasionally, until the grits are thickened and creamy.
While the grits are cooking, heat a large skillet over medium heat. Add the chopped bacon and cook until crispy. Remove bacon from the skillet and set aside.
In the same skillet, add butter and let it melt. Add creole seasoning, minced garlic, and thinly sliced celery. Sauté until the vegetables are softened.
Add the peeled and deveined shrimp to the skillet. Cook for 2-3 minutes on each side or until the shrimp turn pink and opaque.
Stir in lemon juice, chopped parsley, and the cooked bacon into the shrimp mixture. Cook for an additional minute to let the flavors meld.
Serve the smoky grilled shrimp mixture over the creamy grits. Garnish with thinly sliced scallions.