No the gTablet has not been recalled. One of the Viewsonic firmware updates was recalled, which is no big deal.
You can see which firmware you have by going to "settings > about device" and see the firmware version.
Once you figure out which firmware version you have, if you want to put an aftermarket ROM on it, which I strongly recommend (I use Vegan 5.1.1), you can read the How to Root guide here to do it.