This option determines the port at which MLdonkey core accepts connections from MLdonkey GUI client. Setting this option to 0 disables remote GUI connections.
The default port may already be in use on your system by some other application. If you encounter any problems, check if it indeed is in use, and choose another port for GUI connection, if needed.
Default value for gui_port is 4001.
This option is stored in downloads.ini
telnet_port, [http_port]], [[gift_port]