GDCS 2.0 (as we like to call it) is a wiki-style, community-driven version of the GDCS guides.
Instead of having to go through a lengthier process of contacting Guide Managers, anyone can directly suggest changes. As this project is hosted on GitHub it only has to go through a basic approval process before being added to the wiki.
For now, you can modify contents in your own fork and send a pull request, or alternatively submit an issue through the appropiate means.
Please contact one of our Server Admins in the Discord server, they'll be happy to help you with any issue you have!