Here is the GX1 .ogs with several programs and one multi that is a split between a GX1 stereo string pad and a solo patch.
Almost all of the programs use the joystick to increase (slightly) the PWM amount (Y axis) and vibrato amount (X axis)
Also, for an authentic GX1 experience, when changing filter or envelope setting, use them in Macro mode (via the white Select knob).
Most of these programs don't have any FX, to highlight how great the raw sound is. They sound best with a nice Concert Hall type reverb like the Valhalla VintageVerb concert hall preset, as used in this track: https://soundcloud.com/paul-schilling/nationalsang
Let me know if there are any issues with this .ogs