i am from germany and i do a training in an IT-oriented company.
I'm interested in writing an technical instruction about testlink for school and i need a confirmation about using the yellow-black Testlink logo for this work.

Is it allowed to use this without getting in trouble? Who was the designer?
Is it licensed under GNU GPL, too? It would be great, if somebody could give me this informations.
Thank you in advance,
yours sincerely
Reiner Kempkes
Systems Engineer