How I can put the 4 last post of the blog on the static home page?

This can be of help https://generatepress.com/forums/topic/how-to-set-the-number-of-posts-in-blog/#post-148564

Assuming you have set your front page to display latest posts, you should now see 4 posts in your front page. Then you can go to " Appearance > Customize > Blog " and there can you chose to display your posts in columns or masonry.

https://docs.generatepress.com/collection/blog/

Not exactly.
Imagine that I have the front page to publicity and some pictures, another page for the blog with the last 10 posts and the last page is for text and pictures but under the pictures I want to see the 4 last posts in a different boxes.

I want to show the last 4 posts in a different page of front page.

In that case i think the easiest and best solution is to just use Tom's plugin https://wordpress.org/plugins/wp-show-posts/

You can then place the generated shortcode under your images. Feel free to ask if you need help setting up the plugin.