Spokesperson for Espinosa, Ms Monica Gravley, made this known at a media briefing at the UN headquarters in New York on Friday.
She said PGA’s visit to Nigeria was part of her eight-day official trip to Central and West Africa beginning on Friday.
Concise News learnt that the spokesperson did not disclose the agenda of the PGA’s meeting with the president when asked by the News Agency of Nigeria (NAN).
Rather, she promised to keep reporters updated on proceedings at the meeting.
Gravley said cabinet members would join Buhari in receiving the PGA, who would later meet with students of the University of Abuja.
Espinosa is expected to speak on the role of multilateralism and how to respond to global challenges in a fast-changing world, according to the spokesperson.
Gravley said Espinosa would also meet UN officials in the country and take part in a discussion with women on their role in promoting multilateralism.
Multilateralism is an alliance of several nations, for example, the UN, pursuing a common goal.