Question : Word Macro Security Setting with Group Policy

Is it possible to alter the MS Word (or more generally, MS Office) Macro Security Level using Group Policy or a script?

Answer : Word Macro Security Setting with Group Policy

Yes.  See this article:
http://office.microsoft.com/en-au/help/HA011513711033.aspx

More specifically, you need to import an ADM template into your Group Policy, which adds the settings that you are able to configure.

Regards,

Rob.