The place where Gojo and Geto last met is Omoide Yokocho in Shinjuku, which can be translated as "Memory Lane," or in other words, a place you have known for a long time and feel a certain nostalgia towards. It symbolizes Gojo's and Geto's goodbyes to each other.
The kimono Geto is wearing is called Gojo-no-kesa.
After learning about the crimes Geto committed, Gojo squeezed his hands so hard that blood started to ooze out of it.