Then how does this work for content you put in a WP website? Before even getting to that question... viewing output on a website is irrelevant as far as the GP

Then how does this work for content you put in a WP website? Before even getting to that question... viewing output on a website is irrelevant as far as the GPL is concerned, only the AGPL deals with that. You can take GPL code, make some changes to it, put it up on a web server, let people use it... and you don't have to distribute your changes.