I'm afraid that if you want to know the location of every component and the board's dimensions, you would have to take the measurements by yourself. There aren't documents that specify neither the exact board’s dimensions nor the relative location of the components. The only document available that might be of help is the following: Intel® Galileo Gen 2 Board — Design Files. In that document you will find the design files of Galileo Gen2, but you must use the Allegro software to open them.
Thx, very appreciate your answer. I will take some measuring.