bug or hacked? missing gil.

[PetiteMalFleur]

Have you checked to see if you have other characters through the Mog Station that you didn't create? Hackers don't bother selling or taking your items since this requires a bit of effort.

Edit*
Answer to you being in the same place is hacker used a second character to walk up to you, opened trade, had your char give him all your gil, logged off now useless character, sold gil to a buyer on your server who has now essentially stolen your hard work through RMT violations.

There's nothing your can do. Get a security token, change your password.