Since alot of request here is a video on how to update your G-Box MX2 box with OpenElec, Remember there are some bugs involved but for rest it works flawless
Things you Need:
1 SD Card
The Zip file ( Matricom OpenELEC.zip) containing the OpenELEC build, recovery.img, and AML Script.
1 Toothpick or small screwdriver
A little patience (About 15 minutes to install)