Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See page_maxonapi_getting_started_foundations_cinema_parameters.
Parameter: Noise Type
GV_NOISE_FUNCTION
Parameter: Positive Only
GV_NOISE_POSITIVE
Parameter: Octaves
GV_NOISE_LEVELS
Parameter: Time
GV_NOISE_TIME
Parameter: X Coordinate
GV_NOISE_X
Parameter: Y Coordinate
GV_NOISE_Y
Parameter: Z Coordinate
GV_NOISE_Z
Parameter: Vector
GV_NOISE_VECTOR
Parameter: Scale
GV_NOISE_SCALE
Parameter: Frequency
GV_NOISE_FREQUENCY
Parameter: Amplitude
GV_NOISE_AMPLITUDE
Parameter: Seed
GV_NOISE_SEED
Parameter: Noise
GV_NOISE_OUTPUT