Configuration file path is specified with Apache directive (/etc/httpd/conf/gsweb.conf is an exemple):
GSWeb_ConfigFilePath /etc/httpd/conf/gsweb.conf

The format is GNUstep/OpenStep property list.
Here is an exemple with all the possible options:
	
	{
		//Global Parameters
		canDumpStatus=YES;	//YES if server can display status (URL: /GSWeb/status)
		GSWExtensionsFrameworkWebServerResources="/GSW/GSWExtensions/WebServerResources";	//URL of GSWExtensions Framework WebServerResources directory

		//List of applications
		applications=	{
				//The 1st application: MyApp
				MyApp = {
						//List of its instances
						instances = 	{
								//First Instance
								1 = {
									host=145.146.147.20;	//Host of this instance
									port=9001;		//Port of this instance
									parameters=	{ 	//Unused
											transport=socket;
											};		
									};
								};
					};
	
				//The 2nd application: AnotherOne
				AnotherOne = 	{
		                                        //URL of GSWExtensions Framework WebServerResources directory. It overides Global parameter
		                                        GSWExtensionsFrameworkWebServerResources="/GSW/GSWExtensions/WebServerResources";
							//YES to say that this application can be listed when the adaptor don't find an application
							canDump = YES;
							//Unused for the moment
							applicationHeaders = 	{
										header1=1264;
										header2=4567;
										};
							//Instances
							instances = 	{
										//1st instance
										1 = {
										host=145.146.147.20;
										port=9002;
										parameters=	{ 
												transport=socket;
												};
										};
									};
						};
				MyAppVoid =	{
						//Here we have 3 instances
						instances = 	{
									1 = {
										host=145.146.147.20;
										port=9001;
										parameters=	{ 
												transport=socket;
											};		
									};
									2 = {
										host=145.146.147.21;
										port=9002;
										parameters=	{ 
												transport=socket;
											};		
									};
									5 ={
										host=145.146.147.22;
										port=9003;
										parameters=	{ 
												transport=socket;
											};		
									};
						};
				};
	
			};
	
	};