Normally the firmware available for FMG via FortiGuard will be a couple of days late after the official release. So you might want to wait for a couple of days first. For workaround, you can try to download the firmware image and manually upload into FMG.
Until now, I still got only v6.4.7 available. Is there any command with which I can trigger an FortiGuard Update on my FortiManager? I dont want to use local images, so the devices should download the firmware directly from FortiGuard Servers.
________________________________________________ "Many hands make light work."