Once GoGuardian Gateway is configured, filtering policies are implemented to user OUs the same way as GoGuardian Admin.

GoGuardian Admin interface overview: https://help.goguardian.com/hc/en-us/articles/360000176706-GoGuardian-Admin-2-0-Overview

Importing OUs via GAC for differentiated OU-based filtering: https://help.goguardian.com/hc/en-us/articles/360000176866-Import-Sync-OUs-from-Google-Admin-Console

Creating and assigning GoGuardian Admin Policies to OUs: https://help.goguardian.com/hc/en-us/articles/360000176846-Create-a-Policy-and-Assign-it-to-a-Group-of-Users

Filtering website categories using GoGuardian Admin policies: https://help.goguardian.com/hc/en-us/articles/360000176343-Policies-Filtering-Categories-of-Websites 

Filtering Youtube using GoGuardian Admin policies: https://help.goguardian.com/hc/en-us/articles/360000175646-Policies-Filtering-Youtube-Content

Advanced Youtube filtering tips and tricks & best practices: https://help.goguardian.com/hc/en-us/articles/360035863712-Best-Practices-Advanced-YouTube-Filtering-Tips 

Configuring out of school mode for GoGuardian Admin: https://help.goguardian.com/hc/en-us/articles/360000175706-Scheduling-Settings-Out-of-School-Mode

Using the penalty box to restrict specific users without impacting other users' filtering: https://help.goguardian.com/hc/en-us/articles/360000175686-The-Penalty-Box

Global settings (NOTE: at this time, GoGuardian Gateway currently supports Safe Search, Safe Translator, and Block Direct IP access. Block consumer Google accounts is not currently supported: https://help.goguardian.com/hc/en-us/articles/360000176423-Global-Filter-Settings