Gateway Nunatak () is a prominent nunatak near the head of Mackay Glacier, standing 9 nautical miles (17 km) west of Mount Gran, in Victoria Land. Surveyed in 1957 by the New Zealand Northern Survey Party of the Commonwealth Trans-Antarctic Expedition (1956–58), and so named by them because it marks the most obvious gateway through the upper icefalls for parties traveling west up the Mackay Glacier.
This article incorporates public domain material from the United States Geological Survey document "Gateway Nunatak" (content from the Geographic Names Information System).