Yes, I tested this BIOS on Z77A-G43 board, not Gaming edition, but boards are the same, difference is very small (network cards, Lucid Virtu license and sound programs), so it's a 99% chance that SLIC willn't work on original Gaming version too. Also in that thread was said that resent MSI bioses requires Dymanic mod in Phoenix Tools plus some Hex editing, I make Dynamic mod myself and got the same result, then SLIC table isn't completely added.
Bios mod request to unlock bios -Manufacturer: AMI -Motherboard Model: Foxconn 2aca -Bios revision: 7.08 -Bios Type: AMI Hp compaq cq1020uk desktop E-350 processor
Well I am using this board also with Mac OS (hackintosh) and Win 7. I am now not sure which would be best.