Are there resturants in Beijing where I can get non gluten food. ie no wheat, oats, flour, soysauce, barley, wheat pasta, etc.

Some information are provided for you:
The Sweet Spot under Guomao shopping mall provides the gluten free pastry and Jenny Lou's sells gluten free pasta and honey corn flake.
These are all I know and I think you can ask the owner's of these two shops and I am sure you can get more information about the free gluten food.
Hope it helps.