https://www.asus.com/ROG-Republic-Of-Gamers/ROG-G751JT/HelpDesk_Download/
Note that G751 JT models have Windows 8.1 and Windows 10 64-bt drivers on support site. Worry not, All drivers for Windows 8.1 actually worked in windows 7 except Wireless and USB we need to get it from G750 JS drivers. So here is step by step driver installation for Windows 7:
1. USB Drivers : Intel USB 3.0 Drivers
2. Wireless Drivers
-There are 3 type of wireless drivers, choose base on your specification:
The the rest just install you Windows 8.1 Original Drivers, Here is the direct download link if you want to download it right away:
Chipset : Intel Chipset Driver
MEI : Intel Management Interface
RST : Intel Rapid Storage Technology
Hotkey : ATK ACPI Utilities
Audio : Realtek Audio Drivers
Graphic : Nvidia Graphic Drivers
LAN: Realtek Ethernet Controller Driver
Card Reader: Genesys Multi Card Reader Driver
Touchpad : ELATECH Touchpad Driver
PCPC: Intel Processor Collaborative Performance Controller
Mouse : Gaming Mouse Controller
Bluetooth:
Select one base on specification, normally this device pair with wireless. It mean if you are using Intel wireless the you will have an Intel Bluetooth device.
You can get all utilities you want on the official download site here: https://www.asus.com/ROG-Republic-Of-Gamers/ROG-G751JT/HelpDesk_Download/ You do not have to worry about the utilities since it is a software and does not affected by Windows version like drivers.