How to use "Grav Content" particle in Gantry 5 (SOLVED)

Hi, im new with Grav, and it is amazing CMS. But im trying to put some pages created in the PAGE section, into the Layout at Gantry5. I use "Grav Content" particle, but in the Categories, i cant understand what is the page categorie. I tried folder name, tags, metada, but nothing work.

Thanks

P.D: Solved, at the end i found the solution, page have one category box.