Glad that you love the art!
Unfortunately, no. The pictures are not exposed / can not be accessed from the folder. Even if it does, the pictures by them self won't work that well without the tool. Like for example, the parts are all in grey, the color happen through shaders in the tool.
The easiest way to bring it to Game Maker, for now, is probably just to export the character as animated sequence of PNGs. Can you explain why you need to bring it to Spriter?