:Actually it would be a hybrid,why breed them?You could find a mate for both of the same & breed.If you decide to breed the Cal. with the Goini/or watever it may be make sure to represent them as Cal./Goini hybrids......the truth is always the best policy.
No, it would be an intergrade. Intergrade is a cross between subspecies or localities, and hybrids are interspecies crosses. Cali kings are Lampropeltis getula californae and Apalachicola kings are L. g. goini.
I've never heard of the cross being done, and I don't think it would produce a particularly interesting looking snake, but if you do, post some pics! :) Good luck with whatever you decide.