Does samba support vfs object gpfs (vfs_gpfs.so) in Red Hat Enterprise Linux 6 ?

Issue

• Attempting to use the 'vfs objects = gpfs' option in smb.conf throws the following errors in samba logs

[2012/08/10 10:58:56.718346,  0] smbd/vfs.c:167(vfs_init_custom)
  error probing vfs module 'gpfs': NT_STATUS_UNSUCCESSFUL
[2012/08/10 10:58:56.718442,  0] smbd/vfs.c:309(smbd_vfs_init)
  smbd_vfs_init: vfs_init_custom failed for gpfs