Its not currently possible to get the current sprite UV offset or to get any current UV values used on a sprite in teir 1. You can set them but you cant retrieve them meaning that if you do set them then you will have to store those values yourself if you will need them later in your code.
It has been asked for a number of times and it would be really easy to add a function into AppGameKit to retrieve the uv coords. It might even already be a request on github but if it isnt then put it on and see if it gets a few upvotes and they will add it.
