No sign or mention of it on my Civ2 Gold CD that I can find, but I've only ever installed it on PowerPC machines. Google does turn up some mentions of a Civ2 68k demo, so something like that did exist at some point. The requirements for Civ2 Gold are pretty low (7.5.3, I think) so the original, pre-multiplayer gold version could very well have been available for later 68k Macs.