I went back to the Greek restaurant today to check out just how they make their Gyros.
They buy a cone of ground beef and lamb. The manager said he believes it is made in Chicago. It looked pre-cooked to me, but I didn't ask. The vertical radiant heater looked more like a warmer than a cooker due to it's relatively small size. I thought the resulting product was pretty good, but not superior in any respect.
Here is a picture of their setup.
Jim - Another transplanted Texan
Former KCBS CBJ
Large and Medium Big Green Eggs , Black 18.5" WSM, Blue Weber Performer - Stainless, Green Weber OTG Kettle , Brinkmann SnP Pro, and a Stainless UDS. One retired Portable Kitchen grill.
Red Thermapen, Maverick ET-732, EdgePro Apex Sharpener.
Avatar is the original 1951 Weber Kettle