This is a non-profit journalism outlet founded in 2015. Its focus is on gun-related news and it was founded with seed money by Everytown for Gun Safety.
The website has a large team of journalists and the founding editor is named James Burnett. Informative, detailed research such as this (https://www.thetrace.org/2017/03/gun-free-zone-facts/) can be found among a wide array of articles published over the last 4 years.
They do not make "false claims about guns," commentators who say so are typically themselves misinformed about the gun violence epidemic (and often unwittingly pushing pro-firearms industry/ NRA spam).