Comment 9 for bug 227770

It's available in Debian's experimental branch since 2009:

Date: Thu, 18 Jun 2009 13:35:45 +0200
Source: gst-plugins-gl0.10
Binary: gstreamer0.10-plugins-gl-doc libgstreamer-plugins-gl0.10-0 libgstreamer-plugins-gl0.10-dev gstreamer0.10-plugins-gl gstreamer0.10-plugins-gl-dbg
Architecture: source all amd64
Version: 0.10.1-1
Distribution: experimental
Urgency: low
Maintainer: Maintainers of GStreamer packages <email address hidden>
Changed-By: Sebastian Dröge <email address hidden>
Description:
 gstreamer0.10-plugins-gl - GStreamer plugins from the "gl" set
 gstreamer0.10-plugins-gl-dbg - GStreamer plugins from the "gl" set
 gstreamer0.10-plugins-gl-doc - GStreamer documentation for plugins from the "gl" set
 libgstreamer-plugins-gl0.10-0 - GStreamer libraries from the "gl" set
 libgstreamer-plugins-gl0.10-dev - GStreamer development files for libraries from the "gl" set
Closes: 464905

You can download the .deb files from:
* http://packages.debian.org/experimental/i386/libgstreamer-plugins-gl0.10-0/download
* http://packages.debian.org/experimental/i386/gstreamer0.10-plugins-gl/download

They seem to work fine under Natty Beta 2.