Groovix supports the Raspberry Pi 2 and 3.
For the raspberry pi the Groovix installation process is different - you write the image directly to a micro sd card ( 16GB or larger ) instead of using a USB installer.
Here is an uncustomized beta Groovix 2017 image for the pi 3: http://fs1.groovix.net/downloads/2017/raspi/groopi3-2017-uncustomized-a03.img.xz
The passwords for root and gxuser are all just groovix.
Generic instructions to get that image on a card can be found here: https://www.raspberrypi.org/documentation/installation/installing-images/README.md
but if you're very familiar with linux here's the one command you need:
xzcat groopi3-2017-uncustomized-a03.img.xz | sudo dd bs=4M of=/dev/sdX
where sdX is the unmounted card ( 16GB or larger ) , be sure you don't overwrite your hard drive!