This blog contains experience gained over the years of implementing (and de-implementing) large scale IT applications/software.

Oracle Support for GFS/2 Cluster Filesystem

When implementing Oracle into a RedHat Linux based landscape, you may be looking for a cluster filesystem other than Oracle’s own ASM offering (or clusterware if you like old hats).

Oracle have updated their support status for GFS/2.

Checking out My Oracle Support doc id 279069.1 for 11g and RHEL 5, it says:
GFS2 is in technical preview in OEL5U2/RHEL5U2 and fully supported since OEL5U3/RHEL5U3.

You can now get that RHEL cluster up and running in production.