The use of "gold" could be a descriptor or method of differentiation between products and may not necessarily have any relationship to the actual quality. Cigarettes of a popular brand out here used to come in Red, Blue and Gold packaging for different strengths (ie: levels of harmful pollutants). Perhaps this Curry Powder is a gold colour due to Turmeric being the 2nd listed ingredient.
Simply mixing together guessed ratios of the listed ingredients will not necessarily produce the curry powder replica. It is also possible that the "Gold" is nearly the same as the Rajah Mild Madras Powder available to the general public and simply marketed this way for commercial use in 10 kg packaging. Same ingredients but in a different order, notably with the Chill Powder moved down the list and more filler (Bengal Gram) and the addition of Black Pepper.
Ground Coriander, Ground Turmeric, MUSTARD Powder, Bengal Gram (Black Chickpea), Ground Cumin, Ground Chilli, Ground Fenugreek, Ground Black Pepper, Garlic Powder, Iodised Salt, Ground Fennel.
It would of course be interesting to know if anybody did try this powder and if it made any discernible difference.