I'm missing the "outing Bush Sr." part. Other than a click bait headline, it really has no relevance. From your link, here are ALL of the references to Bush:

Months after the scandal had died down, and a few weeks before Spence was found in a room of the Boston Ritz-Carlton Hotel, he was asked who had given him the "key" to the White House. Michael Hedges and Jerry Seper of The Washington Times reported that "Mr. Spence hinted the tours were arranged by 'top level' persons", including Donald Gregg, national security adviser to Vice President George H. W. Bush at the time the tours were given.

When pressed to identify who it was who got him inside the White House, Spence asked "Who was it who got [long-term CIA operative] Félix Rodríguez in to see Bush?", agreeing that he was alluding to Mr. Gregg.

Gregg himself dismissed the allegation as "absolute bull", according to Hedges and Seper. "It disturbs me that he can reach a slimy hand out of the sewer to grab me by the ankle like this," he told the reporters. "The allegations are totally false."