There are often questions about compatibility of 64 bit systems with Dynamics GP.
Below is a summary of the common questions for GP 2010 (Please refer to the System Requirements Page for the latest updates)
The following 64 bit Windows Clients are supported
The following features are NOT supported
The following features are supported
E-Mail Functionality / Word Template Generator
For details refer to the Technology Requirements for Microsoft Dynamics GP 2010 and Microsoft Dynamics GP 2010 R2 Features
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Dynamics GP and 64 bit support