There is a project to develop a Gadget Labs Alsa driver for Linux audio.
A mailing list has been established for this project so people could track the progress and release to the public of the linux driver for the GL card.
There are currently ~10 people subscribed (it's a very small list). If you have any interest in knowing when a linux driver is available for this card, I'd highly recommend following the progress by subscribing to the mailing list. This will be significant to you primarily if you have a Gadget Labs card and want to use it with Mac OS X, because it will start to be feasible (and relatively easy) to have a Mac OS X driver when a linux driver is complete. It is also significant to you if you want an inexpensive way to get 8 channels of analog in/out from your computer with a high quality audio using linux audio tools. The Gadget Labs card was 'state of the art' 8 years ago, and is currently the least expensive way to get more than 4 channels of studio quality input/output to/from your computer (however, the other cards available are also excellent and close in price). Of course, we are always interested in anyone that can help with this effort by providing beta testing of the software, assistance with coding the driver, assistance with documentation, general 'cheering us on' and encouragement, etc.
The list is scheduled to go 'private' and available for subscribers only in 5 days or less. If you are interested in this, please subscribe before the list goes 'private'.
You will be able to subscribe after the list goes private, but won't be able to see postings with the latest information until after you have subscribed and been approved by the mailing list moderator.
The way to subscribe to the mailing list is here:
https://lists.sourceforge.net/lists/listinfo/wavepro-driver-developers
The project summary page is here:
http://sourceforge.net/projects/wavepro-driver/
The project web page is here:
http://wavepro-driver.sourceforge.net/
-Mike Mazarick