I've been confused by all the ground meat recipes in this thread.. to me, yiros was always with sliced meat, not ground. I agree with Mitmondol, it sounds like keftedes, or the doner kebap.
The one I am used to is like this:
How Greek Gyro is Made - Photos of Greek Gyro with Pork
Its got step by step pictures of the kitchen version, and also suggestions for making it at home - not bad at all.
Cheers!
DC