McGinley was selected as Europe's captain ahead of Colin Montgomerie and Harrington believes that the new skipper has the attributes to reproduce the success that Jose Maria Olazabal enjoyed in Medinah last September.
The Irishman said: "He's a little fella and he likes to fight.
"He really has that little bit from his [Gaelic] football days. He's got it inside him and will lead the team well in that respect, as well as being organised.
"He's probably sacrificed the last three years of his playing career and the next 18 months for the Ryder Cup. It's been all about the team for him."
McGinley represented Europe in three Ryder Cups.