Log in to the Cisco ASDM Console with an existing admin credentials.

The first thing that needs to configured is the AAA server group.  

1. Navigate to Device Management -> Users/AAA -> AAA Server Groups
2. Click Add to a new AAA Server Group.

Once on the 'Add AAA Server Group' dialog box, enter the following information:

1. Server Group: Any valid label
2. Protocol: Radius

All other settings can be default.

Next Add a server to the server group.

Once on the 'Add AAA Server dialog box, enter the following information:

1. Interface Name: Interface used to send out Radius Auth Request.  This should be interface that holds the IP that is listed in the GridGuard Radius setup client list.
2. Server Name or IP Address:  IP/Name of GridGuard Appliance
3. Sever Authentication Port: 1812
4. Server Accounting Port: 1813
5. Server Secret Key: This is the Radius secret that is on the GGVA Appliance for this device.
6. Click OK

All other settings can be default.

Press Apply on the Device Management -> Users/AAA -> AAA Server Groups screen to save changes.

If you already have a registered GST user, you should now able able to successfully run a test authentication within the ASDM console.