Apparently G-Sync works without the G-Sync module, even in laptops supporting eDP. Have a look here:
Truth about the G-sync Marketing Module (NVIDIA using VESA Adaptive Sync Technology – Freesync)
Nvidia G-sync Hack (working on every monitor ?) DP1.2 and EDP |...
Nvidia G-Sync hack - it works on every display supporting DisplayPort 1.2
Truth about the G-sync Marketing Module (NVIDIA using VESA Adaptive Sync Technology – Freesync)
Nvidia G-sync Hack (working on every monitor ?) DP1.2 and EDP |...
Nvidia G-Sync hack - it works on every display supporting DisplayPort 1.2