On the heels of the Kerberos release a few minutes ago, we are also releasing version 1.0 of the GSI iRODS authentication plugin this morning.
Tested packages for Ubuntu 10 and 12 and CentOS 5 and 6 can be found at ftp://ftp.renci.org/pub/irods/plugins/irods_auth_plugin_gsi/1.0/.
There are no SuSE packages at this time as the Globus toolkit is not easily accessible for SuSE. If this is a burden, please let us know and we can work harder to make it available.
Please confirm the checksums for the package(s) you download before installing.
The code is open source and available, along with a README:
https://github.com/irods/irods_auth_plugin_gsi
As always, please contact info@irods.org if you have any questions.