The Greeley Tribune reports the concealed weapon permit was permanently revoked Friday, when a judge also ordered school board member Brett Reese to stay at least 100 yards from a rival radio station owner.
Justin Sasso says Reese threatened "a shootout" over advertisers.
Reese has said his remarks were misinterpreted. He says he'll appeal the judge's decision.
Reese had planned to carry his handgun to school board meetings after receiving death threats for his commentaries denouncing King.
He aired the commentary every day leading up to Martin Luther King Day this week.
The board voted Thursday to meet at schools because guns are prohibited there.
Information from: Greeley Daily Tribune, http://greeleytribune.com