I've folllowing citrix instruction for SAG setup
I've created service site but do not see
where to "Manager secura client access and where to add FQDN for AG and STA
see instruction below
In the XenApp Services site, select Manage secure client access > Edit secure client access settings.
Change the Access Method to Gateway Direct.
Enter the FQDN of the Access Gateway appliance.
Enter the Secure Ticket Authority (STA) information