Preheat oven to 400°F. Line a rimmed baking sheet with parchment.
Pat salmon fillets dry. Brush with olive oil, season with garlic powder, pepper, and salt. Place skin-side down on the pan.
Mix softened Boursin with lemon zest until smooth. Spread evenly over the top of each fillet about 1/4 inch thick. Squeeze lemon juice lightly over the top.
Bake 14 to 18 minutes until cheese is golden at the edges and salmon flakes easily at the thickest point.
Garnish with fresh dill or parsley and serve with lemon wedges.