In practice, the GM32-FQ has a higher output than the GM27-FQS and is therefore certified VESA DisplayHDR 400, a figure I verified in testing.
I would like to point out this line is inaccurate. Specifically that there are no Cooler Master monitors that are certified DisplayHDR 400 at the time of me writing this post.
Cooler Master markets this monitor as DisplayHDR 400 "
compatible". It is on the website, the spec sheet on the website and on the box packaging. They didn't market it as DisplayHDR 400 certified, which is what your review is implicating.
You can check the webpage here:
and the spec sheet here:
https://www.coolermaster.com/catalog/setup/monitors/gm32-fq/#specifications
You can also check the DisplayHDR list of certified HDR400 monitors here:
https://displayhdr.org/certified-products/#tab-400
There are no Cooler Master monitors or specifically the GM32-FQ when you search the above list.
To think that a reputable and popular site like tom's can have reviewer that can't be bothered to read up official information and specs and check them before posting a review. I have similarly pointed out Techpowerup making the same mistake, albeit on a different Cooler Master monitor, and now here I am again doing the same thing. Maybe all you reviewers should contact Cooler Master and tell them that their marketing is so misleading that reviewers keep getting it wrong.
https://www.techpowerup.com/forums/threads/cooler-master-gm34-cwq-argb.296809/post-4797404