We’re all big time users of GPS these days, in our cars, of course, but also our smartphones and tablets. GPS is also helping our mobile devices find very helpful information and directions to just about anything that is around us. Here’s my three favorite such apps: I’m really liking Field Trip, a very handy and totally free app from Google for the iPhone and Android devices. The app bills itself as a tool to find cool, hidden, and unique things in the world around you. And that it does, Field Trip give you inside info on everything from local history to the latest and best places to shop, eat,…