As far as I can work out, the quest "Exit the Gambler" does not work.

If you flag it in North San d'Oria and go see the NPC in South San d'Oria, he will give you the correct dialogue, however on attempting to gamble (trade 5 gil to the NPC), if you win, nothing happens.

If you lose, your chat log and interface goes away until you zone.

In order to complete the quest you have to beat him at gambling. The reward is supposed to be a map of KRT.

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Therin / Erith

Fairy (ThoseGuys/LostParadise)
Cerberus (Resurgence)
Phoenix (Beyond/DynamisBums)
Shiva (Apathy)
Nasomi (DraconicBallad)

yup came across it today also he don't give you your winnings either drained my small amount of gil I did have