There is none. (at least... known)
If you're working wit CC, then you are probably a bit familiar with 3D topology. Genesis and CC characters are not the same thing / topology. So what you'd end up doing is making your base in Genesis, export as an fbx, edit in CC, to get an fbx that you would then reuse in Daz and then export for VAM. Which more or less mean that you could simply not use CC and simply do the job in Daz.
Also, the "CC bridge .vap preset" is probably a scam or a wild misunderstanding. VAP files are presets, which means they are simply settings for different aspects of VAM, hairs, clothes, morphs etc... which again, if it's a thing, is simply making the pipeline more complex than it needs to be. If this thing exists, it simply means it creates a vap file with morph values, which would be the exact same thing as playing with morph sliders inside of VAM.
VAM being strictly tied to Genesis characters, you need to work on the same topology. Which means, yes, the best approach and probably only one for now, is to do a proper blender remesh/retopo to Genesis.
If you made a software that could convert any type of character to another topology with flawless quality, no need for human intervention and available in a couple of clicks, trust me... you're rich