GRC Windows 2008 Support

I am preparing a server for a consultant that is coming on site to help install GRC Access Control 5.3. I want to have the OS installed and the server ready to go when the consultant arrives. My question is about support for Windows 2008 (64 bit). The install guide does not list it as a supported OS. However, if I look at the Product Availability Matrix (pam), I only see supported Web Browsers, nothing is listed about servers. This makes me think GRC will run on whatever Netweaver 7.0 supports (which does support Windows 2008).

Does anyone know if GRC AC 5.3 is supported on Windows 2008 (64 bit)? I did a search and found one thread where someone mentions IGS not working.

Thanks for any help!

Andy