Disable GPS during flight in HITL

PX4 Autopilot
1

Hi,

I’m running HITL with Gazebo and PX4 .

How can I simulate GPS loss or stop GPS fusion while the vehicle is already flying, without rebooting?

What is the correct way to disable GPS mid-flight in HITL for failsafe testing?

Hardware**:** Cube Orange Plus
QGroundControl**:** v5.0.8

Thanks.