Identifying whether a laptop has HDMI 2.0 or 1.4

The ASUS ROG GL552VW uses the Integrated Intel® HD Graphics 530 which supports 4k @ 60Hz and the GeForce GTX 960M which also supports 4k @ 60 Hz. So it would very surprising if it did not also support HDMI 2.0 since 2.0 was released 2+ years before this laptop was.

Now having said that, the GeForce website has this to say:

GeForce GTX 960M

Discover desktop-class gaming on a notebook with GeForce GTX 960M. Driving great gameplay at high settings on 1080p resolutions, packed with inspired graphics technologies, and BatteryBoost for improved battery life you can game longer, unplugged.

So you likely do not want to play games at that resolution.

(Source ASUS) (Source GeForce)

All GL552VW models have the same HDMI 1.4 port. Even though you may see a difference in the placement of ports, the specs are same.

From https://rog.asus.com/forum/showthread.php?86882-ASUS-ROG-GL552VW-Product-Information:

HDMI, USB 3.0 Type C and 2x USB 3.0
- USB 3.0 Type-C port
- Two USB 3.0 ports
- HDMI 1.4 port

Chance are it does NOT have an HDMI 2.0 port. Most laptops even with 4K 60Hz screens only have HDMI 1.4 as that is all the regular Intel HD Graphics chipsets support.