I’m afraid that currently, GemBox.Document is not intended for this task.
You see, GemBox.Document’s PDF reader uses WPF which means that it is a Windows-only feature.
Also, it’s not intended for tasks that require high fidelity, please read the “Support level for reading PDF format (beta)” section on the following help page:
However, I would like to mention that we have plans for creating a new PDF reader in the current roadmap. The new reader will utilize GemBox.Pdf under the hood, which will result in cross-platform support, and it will be designed for accurate, high fidelity, representation of PDF to the
At the moment I cannot say exactly when this will become available. If I had to guess I would say that it should be done before the end of this year. Anyway, with that release, you will be able to achieve your desired task.