Just modified my Windows system as per the instructions and can also confirm it works - now have access to all the servers I had before GameSpy went off line - life is good again!!!
Copy of process below!
Below you can find instructions how to apply redirection for different operating systems.Windows NT, 2000, XP, 2003, Vista, 2008, 7, 2012 and 8
1. Go to: %SystemRoot%\system32\drivers\etc\ - SystemRoot is where your Windows is installed, for example: C:\Windows
2. Open file called hosts in your favourite text editor (Notepad is enough)
3. Add the following line to the bottom of the file: 209.105.228.101 master.gamespy.com
4. Save. Done.
OS may need to be rebooted after applying the change.
You will need administrator privileges to edit this file.
Hurry up and make the change - waiting to kick some ass!! lol