You can use GPO to deploy 0patch Agents and have them auto-register to your account using your 0patch account key instead of your 0patch account credentials. The account key is only available for Enterprise accounts and obtainable in 0patch Central under the Account page. (Contact email@example.com to get a trial Enterprise account.)
To deploy via GPO, you will need to create a transform file (MST) using some or all of supported installer arguments. Consult section "Silent Installation and Auto-Registration" of 0patch Agent user manual for the specification of these arguments.