Spread one side of each slice of bread with butter. Place the cheese over the unbuttered side of 2 slices; top each with 3 slices of bacon and drizzle with maple syrup. Top each with 2 grilled tomato halves, mashing down slightly, then cover with remaining bread slices, buttered side out.
Grill with sandwiches in a skillet over medium neat 3-4 minutes per side or until golden brown.
Halve and serve immediately.