GraphCast to GenCast: Input File Changes?

Hi,

I'm exploring transitioning from GraphCast to GenCast. Besides model definition and parameters, do the input files require changes? Specifically:

Are GraphCast input files directly compatible with GenCast?

If not, what specific input file adjustments are needed (e.g., format, variables, dimensions)?

Any pointers to GenCast input file documentation or examples would be appreciated.

Thanks!