BIOS
As you can see from the screenshots above, Gigabyte hasn't chosen to use a UEFI interface for this particular motherboard. The standard BIOS interface is easy enough to navigate, though, and offers us all the overclocking options we could possibly ask for. It made overclocking the APU a very simple task indeed actually.
Overclocking
We managed to achieve a decent 4.6 GHz overclock with the AMD Vision A10-6800K (4.1 Ghz stock speed). This was achieved using a baseclock of 100 MHz with a multiplier of 46x. We used a fixed voltage of 1.425V to achieve this.
See validation here.