Maybe that is because I did not choose proper words for query, but I could not find via web-search how to do my task efficiently in Gimp. Here (on SE) I've found only Crop a big picture into several small size pictures, but that is not directly applicable. I need to make several small size photos to print for documents and idea is to multiply one photo into a matrix of photos on one page: to make same photo into a matrix side-by-side and top-to-bottom w/out empty space. I suppose the task is rather often made and most probably there is an easy and efficient way to do so in Gimp. How to do that?
ADDED: Graphical illustration: