Do they make good indoor dogs?
As much as any very energetic hunting dog. After spending enough time running around, chasing stuff, being mentally challenged, etc., they'll be stoked to come hang out with their family.
Are they high strung? Do they require a large amount of exercise?
I
hope those are two separate questions.
No, and Yes. A Shelty is high-strung. A hunting dog needs a lot of exercise. A LOT. As in, if you're even asking, you might really want to reconsider.
But a properly-exercised GSP (or other VHD) is not what I'd call "high-strung." On the other hand, if you'd rather have a sixpack than go for a run or swim, and watch TV rather than go to the gym, a GSP will be on a very different page. As a fitness nut, longtime surfer, and outdoor sports type who had to go for a trail run last time I went fishing because I couldn't stand sitting there, and who has had another really hyper dog for 4.5 years already, I have found out that my idea of "lots of exercise" differs greatly from that of others. Do not underestimate what "lots of exercise" means!
I have a friend who's had a GSP for years now; here's a typical story. He took her camping with a bunch of people. She brought a tennis ball to one of them. He threw it. She retrieved it. She kept going to different people, and after EIGHT HOURS straight, she was still begging to go chase the ball some more. She wasn't particularly young at the time, either.
Do they smell (like labs, etc.)?
IMO, a bit. They have a thick water-resistant undercoat, so it's hard to shampoo them all the way to the skin. Similar breeds like the English Pointer and Vizsla have much thinner coats and can be thoroughly washed without much trouble, but the GSP is probably more like a Lab. People certainly have them as indoor dogs; they don't tend to reek if kept clean. But some other breeds can be kept clean more easily.
Nothing like a Siberian Husky, but a couple time a year, short-haired dogs do shed. It's nothing a vacuum cleaner won't pick up; you'll just need to clean up a bit extra for a few weeks.
Are they good with small children?
Depends on the dog, as with any breed, but generally yes.
A dog is a dog. Smarter dogs are easier, I guess. I don't know anyone who has their GSP pissing all over or anything, past early puppyhood.
Read this:
http://en.wikipedia.org/wiki/German_Shorthaired_Pointer
Find your local chapter and go to some trainings. Meet dogs, owners, breeders, trainers. See what you think.
http://www.navhda.org/ There are many similar breeds that vary in one way or another, and all worth a look.