According to their website, it should fit with the M2C adapter. I'm not thoroughly familiar with the G2Z, but I have several regular G2's with some different LED models from Malkoff and TNVC and I'd imagine they are probably the same size bezels and have the same threads.
As far as the mount goes, you can use pretty much anything that will hold the G2, it just depends what you want. I personally have the mount that goes on your front sight tower and Vltor rings and that works good for me, but YMMV.
P.S. The TX-4 is awesome