For Office use, I'd chose the Dell Venue Pro 8 or the Lenovo Miix 2 8. Both are 8" tablet, not that much smaller than the G Pad you're looking. Running full Windows 8.1 on a quad-core Intel CPU. So you can install any software you want. You get Microsoft Office (Word, Excel, Powerpoint). If you have the money, it would be better to select the 64Gb version. And you can add more storage with a MicroSD card.
But.... It's running Windows... And the App store is not filled with games as much as what you can find on Android.