Combine water, sugar, lime peel, lime juice and ginger in small saucepan. Bring to a boil over high heat. Remove from heat and cool completely. Reserve 1/4 cup syrup and set aside.
Spray cold grate of outdoor grill with grilling spray. Prepare grill for medium-low heat.
Place mango, pineapple, strawberries and banana in large bowl. Pour remaining syrup over fruit; stir lightly to coat. Thread fruit alternately on 4 metal or heavy wooden skewers. Discard remaining syrup in bowl.
Grill kabobs 6 minutes, or until lightly browned, turning once. Brush pound cake slices with some of reserved syrup. Grill 4 minutes, or until lightly browned, turning once.
Place each pound cake slice on a dessert plate. Remove fruit from skewers. Top each slice evenly with grilled fruit. Drizzle with remaining reserved syrup. Top each shortcake with a serving of Reddi-wip. Serve immediately.