I have two GSPs, and I would not recommend anyone get one unless they're committed to getting the dog several miles of off leash running (almost) every single day. Beyond that, GSPs and other high-test hunting dogs really should have a mental job too, not just running.
If you want to get a labrador (or any other less high strung breeds) and work on retrieving games, AKC flushing dog trials, dock jump competitions, tracking...etc that's awesome. There are people in my local hunting dog training groups who don't actually hunt, they just do club trials.
Before I hunted birds, when I lived in a city, I had a labrador mutt and we worked on retriever trial training all the time. It was really fun:
www.akc.org
Retriever stuff and dock jumping is a crazy rabbit hole that swallows people
Here's a video from an AKC Flushing Dog Trial. You don't have to hunt, but birds will be shot in front of you:
Here's more about field trials:
www.akc.org
Teaching any dog to do
scent tracking is rewarding for you and the dog and can be done almost anywhere:
You don’t have to own a military or police K-9 to teach your dog how to recognize a scent. In fact, you don’t even have to leave your house. What Is AKC
www.akc.org
I haven't done any scent work with my dogs, but my wife has started teaching them