It was quoted back at Citrix Synergy that this ability was coming and it is here. StoreFront 3.6 that was released alongside XenApp & XenDesktop 7.9 can import NetScaler Gateway configurations that have been created using NetScaler firmware versions 11.1 build 48.10 and higher. No longer do you have to manually configure the NetScaler configuration within StoreFront.The first step requires you to export the NetScaler configuration. If you do not already have StoreFront integrated with NetScaler open the NetScaler GUI and click on XenApp and XenDesktop underneath Integrate with Citrix Products. Click Get Started.
Specify StoreFront and click Continue. 
Enter your NetScaler Gateway URL and the virtual IP that the NetScaler Gateway Virtual Server will use. Click Continue. 
Select a public certificate matching the NetScaler Gateway external URL. If you do not have any certificates installed you will have to install one. Click Continue. 
Choose your authentication type which could be LDAP, RADIUS etc. If you do not have a server configured, create one now. If you already have a server created like I have you can use an existing server as below. Click Continue. 
Enter your StoreFront FQDN and click on Retrieve Stores. 
NetScaler will query StoreFront and return with a list of available stores. Choose one using the drop-down box. Enter your domain name and an STA URL. You can specify multiple STA servers if you wish. Click Continue. 
Click Done. This completes the integration with StoreFront. 
Now we can export the configuration file. Click on XenApp and XenDesktop again and you will be taken to the dashboard. Click Download file. 
Click Download. 
The NetScaler UI reports the config is downloaded. 
Click to save the config file when you receive the browser download prompt. 
Next navigate to StoreFront and open the StoreFront console. Select Manage NetScaler Gateways. 
Click on imported from file. 
Click browse and select the GatewayConfig.zip file. Click Next. 
Enter the callback URL and click Verify. 
If the StoreFront server is able to contact NetScaler on the URL provided you’ll get a green tick. Click Next. 
The STA servers are imported from the config file. Click Next. 
Click Import. 
Now that the import is complete, click Finish. 
You have now successfully imported the NetScaler Gateway configuration in to StoreFront. The NetScaler configuration is automatically attached to the store you selected when integrating NetScaler with StoreFront using the NetScaler XenApp and XenDesktop wizard. If you have multiple StoreFront servers make sure to propagate the changes. 