To the best of my knowledge, those midi harp packets should work in any DAW. They are midi files that re-map the white "strummed" notes to the GPO Kontakt player. Find the chord you want, and drag that file in front of the harp gliss in the harp gliss midi track.
A better idea is to place this midi packet slightly ahead of the gliss in a separate midi track assigned to the same midi channel as the glissando harp.
Interesting--I used the Harp Packets once, and they got the job done, but I still much prefer recording gliss from scratch. It could be lack of much experience using the packets, but from scratch is much more precise for me.
Back of forefinger across keys in a key appropriate for the need--transpose to sharp or flat if needed, then in Piano View, shifting the incorrect notes. Fairly fast process which gets one exactly what's needed.