You can download SAP GUI 7.20 from http://sapdocs.info/sap/other/download-sap-gui-7-20/

1. Download SAP GUI 7.20
The new SAP GUI release comes with a number of useful new features:
- Support for Windows 7 operating system & Office 2010 package (32bit version)
- SAP Logon: Hierarchical organization of items in an explorer like view and a tree like view.
- SAP Logon: With release 7.20, an administrator can define a central saplogon.ini which can be
merged into the local user specific saplogon.ini.
- Options Dialog: Almost all options have been merged into a new user friendly dialog that replaces
Tweak SAP GUI and the old options dialog.
- Security Enhancements: A set of maintainable security rules which allow administrators and users
to prevent unwanted access to the client PCs from SAP systems have been defined.
- Animated Focus Frame: Improved visualization of the focus and its movement across the screen.
- High Contrast Theme for SAP Signature Design: Improved visual design for users with visual
impairments, based on the successful SAP Signature Design.
- Better organization of local data: Downloaded files, traces, scripts and other local objects are stored
in different folders (roaming and local) according to Windows standards.
Besides this SAP GUI for Windows 7.20 is fully compatible with older SAP GUI releases.