Gohmert's office and the Justice Department didn't immediately respond to a request by The Epoch Times for comment.
The news of Gohmert's positive test is likely to prompt concerns for lawmakers in Washington.
Gohmert said last month that he wasn't wearing a mask because he regularly gets tested for the virus.
House Judiciary Committee Chairman Jerrold Nadler (D-N.Y.) said in a Twitter post on July 29 that he wishes Gohmert "a full & speedy recovery.”
During the July 28 hearing, Nadler warned several Republican committee members—Reps. Jim Jordan (R-Ohio), Andy Biggs (R-Ariz.), and Mike Johnson (R-La.)—about the need to wear masks. Gohmert was not among those who was scolded.
"I would remind Mr. Jordan, Mr. Biggs, and Mr. Johnson to stop violating the rules of the committee," Nadler said during the hearing. "To stop violating the safety of the members of the committee. To stop holding themselves out as not caring by refusing to wear their masks."
One of the members was heard asking whether it was "permissible to drink a sip of coffee," to which Nadler replied, "it is not permissible."
Throughout the hearing, most members were seen wearing masks, except for during their turn to speak. Meanwhile, some members attended the hearing remotely.