C'mon, limited transfer of gil is 100% pointless - you just fill your inventory with expensive items (eg perhaps Materia, or high level crafting materials) and sell them as soon as you get to your new server.

You could even create an alt on the new server to see what items were most expensive and *make* money. I did this for XI, using ffxiah.com, and made 2mil gil (it was a lot at the time...) when I did a server transfer.

I think that when you server transfer, you should keep progression (xp, quests, achievements, etc.) and Untradable gear only - no other items and no gil.