GATE_module.so has some useful commands:

GREHASH: ircd /rehash analog, do gate config file rehashing
GL:	 Shows List of configured gates and their status (!gl on any GateKeeper channel)
SETINFO: change gate uin info on-fly (format: UIN Nick First Last)

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If you're interested, you may take a look on
/stats E
this will show ircd events. module-registered event begins with icq_
/stats f
this will show ircd descriptors usage. our descriptors begins with 'ICQ'