A GSD is a German Shepherd Dog. That is the exact name of the breed.
If you like a velcro demanding dog, that is the Doberman. The well-bred one, anyway.
Seeing the parents is fine. But do you know if they are clear of the possible genetic defects etc for the breed ? Make sure of that.
Anyway,
*edited* is notorious for buying from puppy mills. Google it. I have to see it, because I go in there to look...it haunts me. Not in the rest of the city apparently. In fact, how many places are there in Calgary where they sell puppies of unknown origin?