Italian company. I'd the GEM S2Turbo. "Wow it's a poor man's Kurzweil" was one comment at a studio session from the engineer.
They did ones with built in speakers, gigging instruments like the S2 and S3 (61 and 76 notes), a cracking one called the Equinox that I think someone on here has and the Promega series (very heavy digital pianos).
I have a pasive sub and two 12" tops that they did. Sound amazing. Sub is very light.
Now the company's gone, gone, gone, wo - oo - oo - oo - oo
SoundOnSound have some GEM / Generalmusic gear reviews. There's a piano module that's still worth owning (if you use a piano module).