I like the 2nd to last picture of her best. She looks crazy athletic--which is how I like 'em.
She's got a better shoulder than many workingline GSDs. She's got a nice length and angle of her upper arm (which is usually where you see a lack), but her scapula seems a bit upright. Would want to see her in movement to see how that affects her front reach.
She has nice height of withers, especially considering she's a young, workingline female (all of which tend toward flatter withers--youth, bloodlines, gender!). Her strong withers lead nicely into a strong, straight but sloping topline with a firm, short back, with a good length of loin (not too long and not too short). Her croup is a bit short and a bit steep. She seems to have some curls/waves in her back hair? Is she in the middle of re-growing her coat? Sometimes the fur will wave more then, when they're growing more on the top and still to come in on the sides--particularly noticeable in the sables.
She's very "moderate" as far as rear angles go, which means that you can't stack her out very much--and you haven't. But she appears nicely balanced front and rear--they match each other, it looks like--again, seeing her in motion would tell the truth of this--is she balanced in movement? Does she seem to have more pull from the front than push from the rear or do they seem equal and balanced as she trots out?
It looks like her feet are still a bit big for her body--may indicate that she's got some growth still to come--or it might indicate that she's still a bit out of coat. Make sure her nails, especially in front, are well trimmed to keep her forefeet looking a bit rounder--they are plenty tight and firm, but the toes look a tad long in the pictures, which I think is an optical illusion because of the black toemarks leading into black toenails.
It's hard to tell in the pictures, but she looks like she might toe out a bit both in front and rear--this seems pretty mild and is likely due to her age. But when you stack her, pick the leg up from the elbow and try to make sure to set her feet so they point straight forward.
As far as the rear feet, also try to make sure to set her feet pointing forward. One trick you can do is to spread the hind feet a bit wider apart than her normal stance, this can give the appearance of a bit more angulation and may also keep her from toeing out in the stand.
Good luck in the show--no matter the results, you will learn something!