- The entire complex is built over railroad facilities along the west bank of the Chicago River.
- The northern two buildings are the shortest, and are twins. Three of the four have green glass, matching the color of the river; only the tallest (Gateway III) is white.
- Gateway Center extends for 4 blocks, from Madison to Van Buren Streets. A public plaza allows pedestrians to follow the river for the 3 northern blocks (the block by Gateway IV has no riverwalk).
- In the late 1980s the riverwalk was redesigned with planters, obelisks, iron fences, and patterned sidewalks.
- Gateway Center originally included a low-rise 900-car garage on the site of the Heller International Building.
Also recorded for this building:
Developer, Fire protection engineering, General contractor, Landscape architect, Owner, Property management, Steel supplier, Structural engineering, Tenant