The Remote Desktop Gateway (RD Gateway, formerly known as TS Gateway) ISA configuration script helps ease the process of setting up an ISA server for RD Gateway supported scenarios such as the RD Gateway-ISA core scenario and the RD Gateway-ISA OTP scenario. The script runs on the ISA server and completely eliminates the need to configure the ISA server through wizards. Instead, users can create web listeners and web publishing rules through the command line. Additionally, the script can validate existing web publishing rules and web listeners. In the event that issues are discovered with them, the script provides a list of warnings and errors to the user. The script is supported on ISA server 2004 and later versions. It can be used to publish Windows Server 2008 and higher versions of RD Gateway. This script, along with information on its usage, can be found here.
I need information how to publish RD GW in ISA server
Please refer to the following link for RD Gateway ISA server core scenario -http://technet.microsoft.com/en-us/library/cc731353%28WS.10%29.aspx