Depending on the copyright, yes, for a fee. If you are the composer, or if the score is in public domain or copyright-free in your country, then please contact us via Customer Service Chat (bottom right corner). Files from Sibelius, Finale and other notation software can be exported to MusicXML and uploaded into the Gustaf App.
Interactive scores are based on a new technical standard called MusicXML. MusicXML files will adjust according to the screen making it an easier flow for the performer. They will also allow you to make annotations or make changes directly onto the score. PDFs have a fixed width so are not as responsive and can be challenging to annotate—and downright impossible to transpose. That’s why we call PDFs non-interactive scores.