I think he already replied you with that information...
From what I know, Lauterbach's LBVH construction was implemented on GPU and shown some good results (although compared to F.e. split-bvh they were a lot worse), there is also hierarchical LBVH - aka HLBVH, that was also built on GPU and this one yields better results than standard LBVH.
Google some HLBVH papers, there are more of them.
I also read that building LBVH for gpgpu is not good idea. And I read that split-bvh building need bins, but I can't understand what is it bins ?