I'm glad your problem is resolved. Here is some additional information that may help in the future.
First, why I targeted the router.
Safari didn't work, as well as Mail. That's an indication that the problem is more general than your email service. And when other devices are still working, the usual cause is the router and/or your iPad's connection to the router.
It is perfectly possible, and even common, for a router to stop working with one device while still working with others, even if that device is exactly the same OS and model. Router's are complex devices managing some very complex protocols. Like computers they occasionally do inexplicable things for no apparent reason at all.
You seemed confused about what your iPad's model and iOS version where. I hope the following will clear up the misunderstanding and make it easier to find the information the next time you need it.
A 10w (10 watts) power supply doesn't help that much. The first thee iPad models used the same (or close enough) 10w power supply. The iPad 4 and iPad Air use a 12w power supply. The iPad Mini's use smaller power supplies, 5w I think. I'm not sure what the new iPad Air 2 uses, but I suspect it's 12w.
Your iOS version has nothing to do with Google. There sere some Google services that came native in older versions (Maps, YouTube), and Safari supports Google Search as the default option in all versions; but Google is a separate company. They don't create iOS, or even have (direct) influence over it.
To find your iOS version number go to the Settings icon > About. It's about half way down the list and will have the main version number in a format something like x.x.x (xxxxx). The part in parenthesis isn't important.
You'll also see a model number here, but it's not very useful. Apple assigns two model numbers, and this one is more or less internal to the company; which makes it kind of hard to look up. You can find the more useful model number on your device's box, on the back of the iPad (in hard to read small print) or in Settings > General > Legal > Regulatory. It's at the very top and starts with an 'A'. For instance my iPad's model is A1475.
Based on that you can look up your model's name in this Wikipedia article, along with a lot of other information:
http://en.wikipedia.org/wiki/IPad