I too just brought home a new pup a couple of weeks ago. I currently have a 2 year old female GSP and the pup is now 8 weeks (female). At first my 2 year old didnt want anything to do with the pup, but now they get along just fine. The 2 year is still jealous when the pup sleeps on me etc, but that is expected.
The 2 year old is very timid and laid back so the pup coming in was a nightmare for her. She has acclimated to her, but the funny thing is, I can tell that the pup is going to be the alpha in our house. She is extremely feisty and will run the 2 year old off when they both want the same toy. Its kind of funny, but they both get along, just not best friends like I had hoped.