au contraire AerocatS2A, the Gove MBZ is located wholly within the Nhulunbuy CTAF. The Nhulunbuy CTAF is one of three Super Dooper CTAFS in the NT extending from ground level to A100.
In the case above, both use the same frequency, 127.8. I would imagine that any other case of an MBZ within a CTAF would also use a common frequency.