Hello dronovden08, and welcome to the Greenbone community!
The Greenbone Enterprise TRIAL does not support the GMP API, and thus it cannot be remote controlled via gvm-tools. The reason for this is that it is only a short-term demo and not a full-fledged vulnerability management solution.
The rest of our enterprise appliance lineup fully supports the GMP API. If you are interested in testing and purchasing an appliance, please contact our sales team.
Alternatively, you can check out our community edition, either via the Community Containers or by Building from Source.