Manusol, The GMA3600 is provided by Microsoft within your Windows 8 (32-bit, 64-bit) or Windows 8.1 installation. This type of driver is called Inbox, and this is a native driver that is supplied with the Operating System.
In other words, the driver is automatically installed during the OS installation. If you are looking for an updated driver, they are available through Microsoft Windows Updates.
I regret to inform you that Intel did not make drivers for Windows* 8 or 8.1 on the Mobile GMA3600 because the chipset was designed before development of your operating system.