Stay safe, and always verify your ISO hashes against official Microsoft MSDN values.
Unlike standard Windows, the Gamer Edition installs fast—usually under 10 minutes. Download Windows 7 Gamer Edition X64 Single Link
This feature is turned off by default to stop annoying permission pop-ups during software installations. System Requirements for X64 Gamer Edition Stay safe, and always verify your ISO hashes
If you find a single link on a forum with zero comments and a 1GB file size (Windows 7 should be ~3-4GB), it is malware. Run away. it is malware. Run away.