Syntax: %bGCHANNOTE [options] <message>%b

 Sends the specified message to channels matching [options].
Alias: %bGCNOTE%b

Valid Options:
  -mask <mask>    Limit matches to channels matching the given mask.

Examples:
         %b/msg %G GCNOTE -mask *bad* Bad channel :P%b
            Sends the message "Bad channel :P" to all channels
           matching *bad*.

         %b/msg %G GCNOTE Have fun chatting!%b
            Sends the message to all channels on the network.
