GB is a middle-of-the-road bar and restaurant. They have a decent beer list, but it wasn't as extensive as I expected for a brewery. I ordered the Chocolate Red Rye Ale, but was disappointed that the chocolate flavors didn't come through.
The food is also okay. Several of us got the sliders, ordered medium, medium-rare and well-done, but they all seemed to be cooked the same. We also got the mussels (not great), the spinach artichoke dip (good!) and the nachos (great!).
The upstairs dining is also a bonus. You can get some great views of Tempe.
Overall, GB is pretty much what you would expect out of a nationwide American brewery.