image directory

Hello,
I have seen that there are people who create blog backlists that are like a directory of images, many images come from many public sites and among those they put images of their website in DoFollow.
Can I do this with GSA ser?
I’ve even seen that they create hosting on Firebase.
I put some examples:

https://acepacbik71.blogspot.com/2020/12/45-mesa-de-centro-redonda-con-tapa.html
https://backpackv28.blogspot.com/2020/12/get-37-tamano-de-la-mesa-de-centro.html

Firebase: https://gatos-dibujos-animados.web.app/

Thank you