To execute Go Live commands you need to connect with device in real time so the Go Live feature needs the monitored device to have Internet connection that time, in case monitored device is not having Internet connection you may not be able to connect with monitored device.
Once you connected with device you can execute number of Go Live commands and can have instant updates of same.
You can login to Shadow Logs Panel and connect to device using Go Live, in Go Live section you can also view history of Go Live sessions and their respective logs.
You can also connect to monitored device with LogsViewer under Go Live section and can also view history of Go Live Sessions. LogsViewer will keep Go Live logs loaded offline with other logs.