President Bush paused during his stay at his vacation home in Kennebunkport, ME, to discuss the nomination of Robert Gates, former deputy national security adviser, for the position of director of the Central Intelligence Agency. Mr. Gates was indirectly implicated of participation in the Iran-Contra affair in a court document submitted to Federal court by Alan Fiers, former director of covert operations in Central America. Mr. Fiers pleaded guilty to withholding information from Congress and said he told his superiors in the CIA of his involvement in the diversion of funds from arms sales to fund the Contras in Central America. Mr. Gates claimed he did not know of the affair until much later, and is the focus of an investigation trying to find out how many people the Iran-Contra affair involved. President Bush took the press to task for presuming Mr. Gates guilty of a crime without evidence to support the claim. He scolded reporters outside his vacation home on the Gates affair and also for allegations claiming Reagan campaign staff members made a deal with Iran in 1980 to keep the American hostages in captivity until after the 1980 presidential election.