Concerning stories about GIB, I have one. Playing real $, in one hand vul vs not, I opened 1♣, my lefty human overcalled 1♥, GIB pd jumped to 2♠, presumably strong. I had Axxx of ♠, but a minimum hand so I bid 3♠. Lefty tried 4♦, and GIB cuebid 4♥, which gets doubled enthusiastically by my righty GIB. I have low doubleton of ♦, and am still not very interested in slam, so I retreated to 4♠. Now lefty persists with 5♦, to which my GIB cuebid 5♥again, and again righty doubled. This time I think, oh well this GIB is just going to carry to slam anyway if I retreat? So I tried the effect of passing -- after all in that 5♥ it said it's forcing to 5♠ -- and lo and behold, so did GIB! So instead of playing in our 8-4 ♠ fit, we played in this wonderful 3-1 fit, and GIB went down 8 (-2300) when we could make 5♠ (but not 6♠). That is an expensive lesson with GIB!