I’ve seen it spelled different ways:
There is even a difference of the spelling by the US COA and the ICA, even a difference in spelling on the COA website and the class constitution!
What is the official way to spell it?
The original name of the class was G65 (1950), G=Gherzi, the name of the 1st. designer. and 65 the L.O.A. No radio control.
1n 1978 appears the Radio control and was added to this class so the new class was named RG65, all together.
Here in Argentina we call it generaly RG and some call it 65.