I slapped GStreamer1 together some years ago using the introspection bindings in Glib. Basically, you point Glib to the right file for the bindings, and it does most of the linking to the C library for you. They worked well enough for my project, so I put them up on CPAN. They cover gstreamer 1.0, as opposed to the GStreamer module, which covers 0.10 (which is a deprecated version).
It has an official Debian repository now, but I was informed recently that it would be removed if development continued to be inactive. Besides having enough time, I also don't feel totally qualified to keep it under my name. I don't know Gtk all that well, and don't have any other reason to do so anytime soon. I was just the guy who made some minimal effort and threw it up on CPAN.
I've found GStreamer to be a handy way to access the camera data in Perl on the Raspberry Pi. It's a bit of a dependency nightmare, and keeping it in the Debian apt-get repository makes installation a lot easier and faster.
So it's time to pass it on. As I mentioned, they're mostly introspection bindings at this point. It would be good to add a few custom bindings for things the introspection bindings don't cover (enums, I think), which would round out the whole feature set.