I recently purchased GPO and have finally got a chance to play around with it (first attempt ). This short piece was done on my laptop using the ensemble players in GPO with the Sibelius demo as the sequencer (I think I will buy this, great program). All articulations were read directly from Sibelius. With some practice, (and the ability to save ), I think this could make a great combination.
I have no idea what it sounds like through normal speakers, so forgive the mix .