And yes, the G500 fleet is grounded. The crews have been left on the ground with no information about the reason or how long this will be last.
But the crews have been send to the Sim for their recurrent events and they get paid the basic salary. Nevertheless, sitting around without knowing what to do in Doha is not a burner.
Looks like, Qatar wants to give the G500 back to Gulfstream for some reason. Nobody knows.