Hi
Hello and welcome @NICOLEXPUPI
Do you have a specific about gyms and wayfarer?
Niantic does not talk about gym or pokestop creation
The community has observed that it is based on some mapping software, and follows a pattern.
It is a bit technical but this article explains the basics.
https://pokemongohub.net/post/article/comprehensive-guide-s2-cells-pokemon-go/
If you want to know about your local area please give the GPS co ordinates so we can find it and comment.