I've spent some time researching weather there was a compatible 120hz display for the GL552VW (DH71) I found nothing.
Decided to try "AUO b156htn05.2" and it was a success, it is a Gsync screen but Nvidia optimus prevents use of it. The screen still works great.

I've only posted this here because I could not find this information anywhere else, and would like to confirm it works for anyone looking to try this upgrade. If this HAS already been confirmed elsewhere on this forum, feel free to remove this and give me a pat on the back for poor research. 😄