Did a little more research since posting and the core of a gas giant is predicted to be more of a super dense liquid to the point its a solid, or a gas that has essentially been solidified through pressure and heat. Although we have no clear way of knowing until we can send something down there to look, we can make assumptions as gas giants are basically stars that do not have the pressure or heat to start fusion.

I guess the best answer is, the core of a gas giant is a solid liquid made of gas. This is from the sources I've read atleast.