Maybe he did, but not now. I just searched through current state of repository and there are no traces of PixelAdmin theme. Also, PixelAdmin is not for free and it's basically illegal to distribute it.
@Martin Of course. Because we use Admin LTE on two projects it wasn't hard to recognize similarities. Except, Admin LTE is for free... and under MIT license (it means we can open source our projects any time without of being afraid that we're going to break some license rules). And also as flexible as Pixel Admin.