Hello Tom ,
In RHEL 6.10 you can use gfs2 fs as CFS . For that you can configure redhat cluster on same node . and the gfs filesystem will be added as resource to the redhat cluster.
Note : both RAC cluster and REDHAT cluster can coexist on same nodes.
Few thing you need to consider before opting for GFS2 fs on cluster .
1: This fs should configured on LVM only.
2: You must configure fencing .