Photogallery whit Grav + Gantry

I use Grav + Gantry. How can I crate a photogallery?

You have two options. You can create a Gantry5 particle, or you can use (or create) a simple Grav plugin. Check the existing plugins in the Grav downloads for some already. There’s also a tutorial in the docs: General Recipes / Create a simple gallery