I do not have a complete solution for you but a suggestion based on experience with an Asus mobo and a Skylake i7cpu and Nvidia 970 gpu.
Go back to the original Basic Skylake Starter Guide. Presumably you understand how to mount the EFI partition. Use the configp file you can download. Modify it, strictly following syntax and correct insertion points, as described on that page. In my ignorance I just used text editor. Download the other kexts and install into Unibeast as instructed. If you have an Nvidia card use appropriate boot flag to install. The guides to mobo settings are fairly comprehensive on that and other pages on this website and I would make sure they are all correct. I forgot that my mobo had a modest 15% overclock but that did not cause any problems. As always if you have Windows on another hard drive it is wisest to unplug that drive while installing OS X.
That should load El Capitan as well as Clover. It should supply USB 3 support at least for the back panel USB 3 ports (and possibly others but I presume you have read the arcana of Skylake and USB 3). All RAM should be recognized as should all processor cores including virtual. What is being installed I presume is not specific to the mobo but generic for the chipset so I do not see why it would not work on a Gigabyte mobo as it does on my Asus Maximus.
You may not be able to boot off your SSD, but I do not see that as a deal breaker. Running Multibeast may not solve anything and may render the system unbootable (my sad experience) but is worth a try--reinstallation should be a snap. To be honest I have not tried running Multibeast since the last El Cap upgrade so it may work now but based on my limited understanding I have my doubts.
If you boot off Unibeast, no flags should be required but you will have to see, you should have mobo network function. The rest is up to you. A simple workaround for audio is an inexpensive USB audio adapter which many people have used for all generations of OS X and hackintoshes. That is exactly where I am stuck now, mainly because it works well enough for me. I am typing on that machine running a 4k display with the Nvidia drivers (the generic OS X drivers did not support 4k) and the last El Cap upgrade. It isn't perfect but is quite stable except for random video driver related glitches in Photoshop that affect the image on the desktop but not the saved file. I am able to use this installation for work with all needed programs and peripherals, particularly color managed printing, which I would rather do than obsess about booting off the SSD or motherboard based audio.
I did not have success--as in many many failures-- following guides kindly posted by others using their configp and procedures for the same ASUS mobo. I simply do not understand all the file modifications required which I suspect is most people's problem with Skylake, so a more generic approach may also work--within noted limits-- for you. Hopefully Apple will further modify the OS to support the generic Intel chipset with upcoming Skylake laptops so the wizards who run this website can make installation as reliable as with older chipsets.