Reduce heat to low and simmer, uncovered, for 45 minutes. Add to gumbo and heat thoroughly. Remove bay leaf before serving. Precook fresh sausages in deep skillet in wine over medium heat, simmering gently for 20 minutes. Drain sausages and discard wine.
Place sausages on gas or charcoal grill over medium heat.
Grill a total of 10 minutes, turning once, until grill marks appear and sausages begin to turn golden brown. Meanwhile, place bread slices on grill for 3-5 minutes on each side or until the bread begins to toast light brown. Remove bread and sausages from the grill. Cut each sausage into 3 or 4 long diagonal slices. Arrange 2 or 3 slices on each piece of bread.