Can the Terms of the GPL Prevent GNU/Linux being used for War?

There's been a lot of noise on the internet recently about the fact that the Windows-based software being used in the remote control system of drones use by the American military has been hit by a virus and this has caused the Department of Defense (DOD) to use GNU/Linux which is a more secure option. This has, predictably, caused raised eyebrows and demands by some that any military organisation should be prevented from using GNU/Linux in offensive weapons systems.