So, when you see , you are looking at the software component governing the first primary USB 3.0+ controller on your specific Gigabyte board. "0" typically denotes the first logical instance of the hub (some high-end boards have multiple XHCI controllers, indexed as 0, 1, etc.).
– It's invisible when working, which is ideal. The rare issues are almost always fixed by using Microsoft's inbox driver, not a special Gigabyte one. The naming with "gigabyte" is mostly cosmetic. xhci-root-hub-0-driver-gigabyte