Gold, in the realm of metals, and awe, in the realm of human religious modes, are both connected to the sefirah of gevurah (and therefore connected to each other). (Silver, on the other hand, is connected to the sefirah of hesed, which is connected to love.)
For the connection of gold to the sefirah of gevurah, one could cite the many mentions in the Zohar of zuhemah de-daheba (the dross of gold) as a kind of extreme extension of the sefirah of gevurah. Also, see Binyan Olam, by the Ramhal, section 'Ha-Matahot' (the metals), in which he gives a full list of correspondences between the earthly metals and the sefirot.
For the connection of awe to gevurah, it is very common for the Zohar to assume that the patriarch Isaac is an embodiment of the sefirah of gevurah. Isaac's religious attitude is assumed to be awe, as manifested in the appellation for God connected to him, 'Pahad Yitzhak' (the Fear of Isaac).