Hi. I'm not sure if this has been previously covered but I came across this USB dongle that allows 3G capability to your tablet. There are reviews that say its working well with many android tablets but I'm not sure about the gtablet.
If somebody is able to get their hands on it, please check and post review for the HUAWEI E1750 Dongle
If somebody is able to get their hands on it, please check and post review for the HUAWEI E1750 Dongle