Citrix Access Gateway is available for Windows XP, although Windows XP is no longer supported by Microsoft. The applicable range of Windows XP versions includes Windows XP Professional SP3 32-bit edition, Windows XP Professional With Service Pack 2 64-bit, and Windows XP Embedded.
Citrix Access Gateway is a secure program that performs preauthentication via a login page, after which the user can download and install the intended client. The exact nature of the authentication depends on the specific security protocols that the client has in place, although the security checks performed by Citrix Gateway after verification are uniform. These consist of firewalls, anti-virus protection and system updates.