If only you'd posted this 24 hours beforehand and I would have lent you my broken iCommand for the season..
It is stuck on temp and speed but would ring with alarms. Anyway..
The alarms should come up on the HDS, but they won't have the same detail as the iCommands, at least for everything. My old Ray kit (same as PD's) just said "engine alarm" and nothing more. The new Garmin gives a bit more detail but not a huge amount.
Incidentally, if you are thinking of going for an LMF over a true iCommand then would be no loss by going for a GMI10. The screen is just so much better.