Is there a wordpress bridge to links or the gt community script>

What I am looking for is that, I want users to register at wordpress installation on my site and then be able to login to links sql with their wordpress account (without having to re-register for links and creating another account for links sql). The other way is that someone can register to gt community script on my site and then be able to access the wordpress account without having to register again. Has anyone done this? Thanks!