I seriously doubt its 14g of carbs even with fillers. Its mostly lamb with beef. I think ground lamb and beef combined and they press it.

According to fitday it has no carbs and according to the guy who makes it for me says there is nothing but meat in it and they make it themselves.

You can also find tons of recipes for gyros and I have yet to see one add flour or anything else to the meat that would add 14g of carbs.

I wouldnt worry about the gyros, if you are eating them and still losing then you are fine.

If you are that concerned, just ask the place where you got it from if there are any fillers in the meat.