Load the image file into Archicad as you would a library; using the Library Manager...
The answer is actually in your question.
Creator of Cadswift's parametric GDL libraries
Creator of Infinite Openings and Component Catalogues
Push the envelope & watch it bend
website:
https://cadswift.com.au/
YouTube:
https://www.youtube.com/user/CADSwift/playlists