Mmmmm......
If your approach plate has printed on it "Loc Out Minima" and you have briefed for that in the event of a GS failure ABOVE the Localiser minima you may continue the approach to the "Loc Only" minima. That is after all why those minima are included in the ILS approach plate.
If you
only have minima for the ILS approach and the GS fails then you MUST fly the missed approach procedure if at the time of the failure you are in IMC .... obviously if you are in VMC you may continue the approach visually.
It is probably wise to be aware that you can convert that approach .... there is an arguement to be made that in a helicopter unless you are carrying alot of alternate fuel you might be putting an aircraft at risk by going missed approach unneccesarily and end up having to declare a fuel emergency. I know it should not happen but the realities mean it may (ie say flying IMC in a Bk117 which ain't got the best endurance in the world?).
Cheers
