is it rooted yet?
Hello, i have same device with you too. Axioo Picopad 7 GGG
Is your device rooted alreay?
If it isn't yet, try to search "framaroot.apk" on Google.
It is application that allow you to root your device and it's
very easy to root with this app. No need to be confused.
It works on mine.
When your device is already rooted, you can do experiment
and custom your device as much as you want.
p.s: By the way, i was looking for the stock and custom rom for this device too, and it seems there are very seldom people that have this device too, i only could find custom rom for another series of Axioo Picopad 7 (like GGC, BGT, and GGD) except GGG like what we have.
But don't worry, as long as you are already rooting your device, no need to find custom rom, i think.