Well, a list of BIOSes for that laptop can be found here: https://www.asus.com/us/Notebooks/ROG-GL702VM/HelpDesk_Download/
But more importantly, why? From the list of BIOSes listed in that link, which one is installed on an individual laptop will depend on when it was made. I.e. a laptop made before the latest BIOS was released may not have the latest, while a new laptop probably would. But again, I don't see what difference this makes to you or why you want to know.