There are few ways we can deliver you the gil.
1) Default one. Our representative will meet you in Upper Jeuno by the mog house, please be there after you place order.
2) If you can't get to Jeuno city, please come to the live support chat and inform our operator about that. In that case we can send you millions through mog house to any mog house in game. As we can only send you 1M of gil at a time you will have to be online and take them out one by one.