All dogs that have fur shed to some extent. I would guess that GWHPs shed in a similar way to Labradors (thick outer coat and dense undercoat), but I can tell you from experience that those little wire hairs are poke-y! Especially if they get caught in your shirt!
They're listed in my breed encyclopedia as being a "2 out of 4" for grooming time. German short-haired pointers are supposed to be easier to maintain, coat-wise.