Network driver is on the Gigabyte CD, as are a few other drivers for the chipset. Install from the CD then go to the Gigabyte site to get current versions, or you could download those from the gigabyte site first and then install.
Don't use the Gigabyte App thing from the CD. It isn't current and creates a shed load of errors. If you need that for example to control fan speeds from within windows over the motherboard, download current Windows 10 version from Gigabyte. Indeed probably don't install anything other than drivers from the CD and then update those, as that CD seems to have a lot of other outdated junk on it.
Don't use the Gigabyte App thing from the CD. It isn't current and creates a shed load of errors. If you need that for example to control fan speeds from within windows over the motherboard, download current Windows 10 version from Gigabyte. Indeed probably don't install anything other than drivers from the CD and then update those, as that CD seems to have a lot of other outdated junk on it.