1.6 GHz Intel Core Duo, Pentium 4 or Xeon Processors or higher
2 GB RAM or higher
500 MB minimum Swap Space
3.2 GB free space

Version: 9.3 and above - WCS, and WMS
Version: 10 and above - WCS, WMS and WFS

Pentium II CPU
64 MB RAM
40 MB of hard drive space for installation
Windows 98/2000/ME/XP/Vista/7/Server 2003

Version: GM 12.00
System Requirements at Global Mapper's online manual