Can't have enough gas.

[PB666]

http://www.compoundchem.com/2014/07/25/planetatmospheres/

Technically if hydrogen is metallic at high pressures its no longer a gas.

 

[K^2]

The metallic phase would have a clear phase transition from non-metallic supercritical fluid that makes up the bulk of Jupiter's "atmosphere".

Part of the problem is that we don't really know exactly what sort of a state metallic hydrogen is going to be in. The options are quite numerous, including some researchers believing it to be a supersolid. That would make it an even crazier compound than the plastic crystal methane available on some other worlds.

[lajoswinkler]

It's not useful to use the classical three state phase model here. Metallic doesn't mean phase, merely properties like electrical and thermal conductivity, as well as luster.

It wouldn't be describable as a solid, liquid or gas. Perhaps not even a supercritical fluid.