Preheat the grill or grill pan over medium heat.
Slice the eggplants into ¼-inch thick rounds. In a mixing bowl, combine olive oil, garlic powder, salt, and pepper. Brush both sides of the eggplant slices with the mixture.
Place the eggplant slices on the grill and cook for about 3-4 minutes on each side, or until they are tender and have nice grill marks. Remove from the grill and let cool slightly.
Lay out the tortillas on a clean surface. Spread about 2 tablespoons of hummus on each tortilla.
On top of the hummus, layer the grilled eggplant, sliced red bell pepper, cucumber, spinach, and feta cheese.
Tightly wrap each tortilla around the filling, folding in the sides as you roll it up to secure the ingredients inside.
If desired, wrap each wrap in foil or parchment paper for easier handling and to keep warm.
Serve immediately and enjoy your delicious grilled eggplant wrap!