gaydirt -- new word?

[Mullins, Bill]

 From _Philadelphia_ magazine, Oct 2004 issue, "Under the Gaydar:
Why the press didn't out James McGreevey" by Jason Fagone.

Regarding the search for proof of rumors that McGreevey is gay:
" While running Christie Whitman's '97 campaign, Wilson had fielded calls
from "great old venerable metropolitan institutions" whose reporters were
looking to hit gaydirt. "

I had heard gaydar before, but "gaydirt" is a new one on me.  Didn't find it
anywhere else:  Google, Google Groups, Proquest, cursory search of
Lexis-Nexis, Wash Post, LA Times, SF Chron.