When you use GemBox.Document to create a document with bold or italic text, it will use the actual bold or italic font if it is available on the system. If the font file for bold/italic is not available on the system, GemBox.Document will use the default font. However, it would be nice if faux bold/italic would be supported, since Word also supports this feature.
Official response
Mario - GemBox
Hi,
This feature request has been implemented and is available in the latest versions of GemBox.Document.
Regards,
Mario