@gerd2002 Thanks for your interest in contributing to GitLab EE!
GitLab EE has a proprietary license and you need to be customer to in order to obtain a license. You linked to docs that are part of an employee on-boarding, so you can't generate license that way.
I suggest contributing to GitLab CE instead! If you are an existing EE customer, you can use your existing license key in GDK.
Grzegorz Bizonchanged title from Falg EE license generation docs as internal use only to Add notice about internal use only to EE license generation docs
changed title from Falg EE license generation docs as internal use only to Add notice about internal use only to EE license generation docs