Is it possible to use a custom ROM?
Genymotion only uses the stock AOSP vanilla ROM version of Android.
> Warning: We legally cannot distribute custom ROMs or custom interfaces, especially the ones from manufacturers.
Touchwiz is a proprietary touch interface from Samsung that is not available for licensing by external parties.
It is also impossible to import a custom ROM of Android into Genymotion, or modify the current ROM, for technical and legal reasons.
So, you can't import and use CyanogenMod in Genymotion.