Lab Rat needs your help again in Gray Zone Warfare, and they want you to check a missing person report for them. They need you to track down Aulii Syvongsa, and they were last seen near Hunter's Paradise, which doesn't bode well for their survival.
The Brave | Lab Rat | Gray Zone Warfare GUIDE | Fast/Solo | Mission Tutorial
You need to investigate the area where Aulii was last seen and see if you can learn anything from it. You don't need to bring a tracker to complete this quest, but you should expect some heavy resistance when you reach the location. Hunter's Paradise is a location in Gray Zone Warfare with plenty of resistance for you to fight through.
The only location where you can learn more about Aulii Syvongsa is in Hunter's Paradise, which is located near Firing Lane. The item you're looking for is a small note that shows that you've discovered Aulii and learned what happened.
When you previously explored this area for Gunny during On The Range or searched through it for True Grit, the Firing Lane was probably the most heavily guarded area in this location in GZW. If you can, I recommend going around the northern side of the facility and avoiding going directly through the troops guarding the eastern side. You should be able to avoid a handful of checkpoints, with many of the NPCs patrolling the central area of the Firing Lane.