I don't have the BTS list, but I've noticed when you mouse over the techs in the tech tree it shows which GP can pop that tech. (Don't remember ever seeing that in vanilla or warlords).
Also try the awesome Civ4 - BTS Unaltered Gameplay modpack, which displays the next 2 techs that each type of Great Person would be able to research right on the tech screen. Very handy.
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