@Ryan_O If you have tried targetbsp & bogdan's suggestions above, then I would just go through all of the BIOS settings looking for anything that might affect the M.2 & SATA. Sometimes default settings do leave things disabled or in an improper state for some hardware. Unfortunately I'm not familiar with Gigabyte boards or the newer non-OEM BIOS settings available.
If you cannot find a solution, I would contact Crucial Support directly and let them know about the incompatibility in case they have any ideas. Also you should be able to return it for a refund if they are unable to help you get it working on the Gigabyte board. While Crucial does monitor these forums a post can sometimes be overlooked.
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