Just discovered a neat trick. If you have lots of complicated data going between Unity and Gamesparks, MonoDevelop doesn't do a very good job of letting you review the data. Also, you'll find you're running out of monitors & field-of-vision if you want to monitor server output as it arrives.
If this is you, try this:
1) Cut and paste GameSparksTestUI.cs into a script that communicates with Gamesparks
2) Consolidate any duplicates (Awake, Start, etc.)
3) Run your game and the window will appear on top of it.