SMS PASSCODE supports CSG, CAG5, CAGE with receiver 4.2.x on iOS devices(Iphone,Ipad)
Citrix released Citrix Receiver 4.2.x for Apple iOS devices (Iphone,Ipad) in December 2010. The big news in version 4.2.x was that it supports Webinterface, so you could make access your Citrix XenApp,XenDesktop by authenticating on the Webinterface. In earlier version 4.0.1 it didnt support Webinterface, so the only way to provide a secure two factor authentication solution with SMS PASSCODE access to your Citrix infrastructure from your Apple Iphone,Ipad device well you had to buy a Citrix Netscaler (CAGE). SMS PASSCODE supports authentication with Citrix CSG, CAG5 (Access Gateway 5), CAGE (Netscaler) with Citrix Receiver 4.2.x for Apple iOS devices.
See the belowed chart to get an overview of support