BIOS updates for CPU microcode are the ones to get for those protections from Spectre and Meltdown.
F7
1.Update CPU microcode for upcoming CPU
2.Improve windows boot time
F6
1.Support Optane memory
F5
1.Update CPU Microcode
2.Improve graphic card compatibility
Gigabyte suggests customers who have purchased a GIGABYTE board are strongly recommended to visit the GIGABYTE official website immediately for the latest BIOS updates.
https://www.gigabyte.com/MicroSite/481/intel-sa-00088.html
New versions of Chipset and Intel Management Engine software are also recommended.