GSM-45647
-shard  a name of the shard
-gdspool a name of the sharded gdspool. This parameter is optional in 12.2 since there can be only one sharded pool in a GDS
configuration.
        
        -gdspool a name of the sharded gdspool. This parameter is optional in 12.2 since there can be only one sharded pool in a GDS
configuration.
Cause
GDSCTL help message.