Creating a photoshoot collage / gallery

[projectthirteen]

Hey all, 

Ive come across this lookbook collage on a few websites and love it. 

I'm wondering if anyone could tell me how to do this or has the code to do this? (Is this through creating a blog??)

See a reference image below

Greatly appreciate any support. 

My URL: https://project-thirteen.com.au/ 

reference image URL: https://about---blank.com/en-au/blogs/news