Will open with i don't climb or use climbing gear but I do know safety equipment.
Did a quick search about 'GM' gear, and came across this..
An excerpt from"http://outdoors.stackexchange.com/questions/7344/is-this-chinese-rock-climbing-gear-manufacturer-reliable"
"The 2013 article has a more optimistic view, noting some of the in-house Asian stoves makers are showing "serious design and development work". An example of this would be with the Chinese stove-manufacturer Fire Maple, which appears to have added skilled engineering talent to their company and is doing its own development.
Returning to the "GoodMakings" company and their climbing hardware, I would be curious as to whether this company is an OEM for more well-known brands, as that suggests a better chance of manufacturing quality. (Someone with access to the appropriate testing equipment could likely order some of their items and run a few tests.)
Now for the questionable bit. I see their helmet displays the UIAA Safety Label (the image on the back of the helmet), but am not able to find mention of this brand in the UIAA's database. This is worrisome, and suggests a possibility that the certificate markings may be "purely decorative"."
Turns out the UIAA has a blacklist, which are companies that falsely claim they have UIAA certification. That itself to me would be concerning. Here's what they say about GM
GM: The UIAA has received email from climbers in USA, Brazil, Finland and Australia that GM advertising gear with the registered UIAA Safety label logo GM has never applied for a UIAA Safety Label. We consider this to be an unacceptable use of UIAA name in order to create the impression that these products have been tested and approved by the UIAA. The UIAA therefore, cannot guarantee that the products from GM meet up to the standard set by the UIAA Safety Label.
For not much more you can buy reputable equipment from a reputable store. I like to save a few $'s here and there but somethings aren't worth it.
EDIT: FYI
http://www.theuiaa.org/Black-List-and-A ... tices.html