I am all for the kind of ideas zenmaster suggests. As an example, after having tried the CV with Venice on Prince/Tiny Islands, I tried the same settings with Shaka and restricted myself to one self founded city. I actually finished the CV faster (t170 vs t192) with Shaka than with Enrico even if the starting location was worse, albeit including some naval warmongering (Moson Kahni was just awesome). Maybe there could be self-imposed limitations (have to take certain policies) or a requirement to achieve something (build a certain wonder or found a religion)? Or am I altering the spirit of the Gauntlets too much?
I think the only special settings the system can identify are one city challenge and required opponents i.e. settings chosen before the game actually begins. In game restrictions are not possible, other than specifying victory condition of course.
Which leads me to wonder: is victory condition:any specification possible? Have never seen one so I doubt it. Might make an interesting gauntlet if the other settings were done well.