The 49ers signed Gross-Matos to a two-year, $18 million contract Thursday.
Gross-Matos finished the regular season with 36 tackles (19 solo), including 4.5 sacks, in 12 games.
Gross-Matos logged three total tackles (one solo), including one tackle for loss and 1.0 sack in Sunday's 26-0 loss to the Jaguars.
Gross-Matos (knee) is active for Sunday's contest against the Falcons, Darin Gantt of the Panthers' official site reports.
Gross-Matos (knee) is listed as questionable for Sunday's game versus the Falcons.
Gross-Matos (hamstring) is active ahead of Sunday's game against the Buccaneers, Darin Gantt of the Panthers' official site reports.
The Panthers activated Gross-Matos (hamstring) off injured reserve Saturday, Mike Kaye of The Charlotte Observer reports.
Gross-Matos (hamstring) is listed as questionable for Sunday's game at Tampa Bay.
Gross-Matos is out for Sunday's game against the Titans.
Gross-Matos (hamstring) was designated to return from injured reserve Thursday.