On the assets page for Virtual Machine: SDCS.Server_name:8443/webportal/#/dcss/assets
Add a field for the total status of the GVM's; ie: Power Off Count and Power ON count
This filed can be also added to the Cluster section as a display box of red (power off) or green (power on)
The status of power on and power off totals for all of the GVM's can also be added to the All NSX GVMs page;