It's time we finally put this ultimate question to rest!

[Kagato]

Gil.

Is it pronounced like "Jill"... Jack and Gil go up the hill to fetch a pail of water.

Or

Is it pronounced "Gill"... Fish have Gils.

[Finalfreak]

Second imo ^^ I never heard anyone pronouncing it as 'Jill'.

[Ayanne]

The second one.

[Jinko]

Second one obviously.

I suppose next we will be pronouncing Gold, Jold ?

[Kagato]

Second one obviously.

I suppose next we will be pronouncing Gold, Jold ?

You'd be surprised how many people have tried correcting me saying It's pronounced "Jill." SO MUCH so that I thought me pronouncing it as "Gill" was wrong.

[Rau]

Second one obviously.

I suppose next we will be pronouncing Gold, Jold ?

Infallible logic.

[Krausus]

I have always pronounced it like the second one, then again I mispronounce Ifrit all the time

[Senuska]

Second one.

[Endemerrin]

I have never heard it pronounced with a J.

[Zyph]

Gil as in Gilded

On a side note I had been playing a ton of FFXI and when I was in Japan accidentally called Yen "Gil." Luckily it was only to my friend otherwise it would have been the most embarrassing thing ever.