The utility described is not available for as-a-service customers.
The Gateway Control utility, gtwcontrol, modifies the default values in the fields of the gateway control Globally Distributed Object (GDO). GDOs are binary files that store Advanced SQL Engine configuration settings. They are distributed to and used by every node in the system. The PDE layer of Advanced SQL Engine ensures that the GDO is consistent across all virtual processors.
There can be multiple gateways per node if the gateways belong to different host groups and listen on different IP addresses.