The Gate Won't Open is a discovery sidequests in Chapter 8, "Budding Bodyguard", in Final Fantasy VII Remake. While moving through the backstreets, Cloud Strife attempts to open a gate, which will not open. Aerith Gainsborough finds another way around the gate, but the two search for a way to open it.
The quest is begun in "Through the Backstreets", after attempting to open a gate door that is locked from one side. It can be completed later in the mission, after arriving on lower level on the other side of the gate. A ladder just next to the waypoint can be used to climb up and open the gate. Doing this provides a shortcut back to the vending machine and bench, but otherwise is not necessary to complete.