Nope... different bolt pattern. Gen V has 10 bolts like a Mk4, but a different pan hoop. The Gen VI has 6 bolts, but the same pan hoop as the Gen V.
You CAN re-drill the block to take the other... they do share the same dowel pins and a couple bolt holes, but only reason to do that is if you have some sort of cam drive cover that is either quite spendy or oddball.