I have trained 5 shorthairs and am currently helping another guy with his first. Can a GSP break ice to retrieve geese? Yes. But that's not what it's optimized for.
A couple of friends were getting into upland bird hunting and got trapped into one way of thinking. They ended up focusing on getting litter mate labs, so that's what they did. The thing is, they both liked upland hunting far more than they liked waterfowl. They also were simply taken by the sight of a GSP slamming on a point, holding it until you walk it up to shoot it, and then you getting to stand around while the dog retrieves to hand.
GSPs are generally easier pointers to train and will cover up your training mistakes. By "well bred", Greifshorthairs means -- learn about the pedigrees and choose a good breeding. The best way to do this is to buy a repeat breeding, i.e., one that has been done before. Then take the time to actually watch the prior offspring work in the field. This will take effort, but it will be worth it.
Finally, look into a local NAVHDA chapter. They have training days all the time in the spring/summer. Great guys and they will share what they know, their equipment, and leads on dogs.
Good luck, there's nothing like a good bird dog!