It's technically not a problem. But for each challenge and each page, someone has to define the pages as coordinates. For example with a top left coordinate and a bottom right coordinate. If you know of such lists, feel free to add that information to your question, and it will increase the likeliness of anyone doing this, a lot.
If such lists exists, the rest is very easy.
You should also know that most checkers are provided by users of Project-GC with our plugin-language. I just wanted to make that clear, since I had a feeling you did not know.