Gallery Page

Hi,

I have alot of galleries that are currently displayed in posts but my viewers are having to scroll too much, I wanted to set up page that displays all the gallery posts as 125×125 images, and once clicked it opens the whole gallery.

I really love this gallery it does exactly what I want visually but does anyone know how I could create one like this for my site. https://www.grimedaily.com/gallery.

Thanks