My only thoughts are that, one) your dog will probably struggle to hold his point if he's allowed to chase game...he may quit pointing altogether, and two)gsp's are long legged and fast, which would make a rabbit race tough. Beagles are good becuase they aren't as fast and can keep the rabbit moving a distance ahead so you can shoot without peppering the dog. With a big fast dog like that, he may be closer in on the rabbits when you shoot and you could pepper him. You could always get two different dogs...can't have enough huntin' dogs.