Dear Zlatko Stapic,
a very simple workaround is the creation of an image showing the text and simply rotating the image. For instance, you can create a textbox in PowerPoint, rotate this text box and save it as an image.
More details on how to integrate an image in a Graphrep can be found here: https://www.adoxx.org/live/faq/-/message_boards/message/709471
Please get in touch with us if you should have any further questions: firstname.lastname@example.org.
the ADOxx.org Team