How To Install Android 5 on an LG G Pad 7.0?

I have an LG G Pad 7.0 running Android KitKat (4.4.2). Could I update it to Android 5, even though there is no release for the G Pad 7?

I would also by fine with the latest version of CyanogenMod.

Also, I am very new to Android, but is it flexible in the way that you can change the Android version easily, or install another UI?