gnome-terminal should respec WAYLAND_DISPLAY
am starting on tty0 gnome with "startx" and on tty5 sway, a wayland compositor. then i start gonme-terminal on sway, and it is displayed in gnome. the environment is DISPLAY=:1, and WAYLAND_DISPLAY=waylond-0.
all other gnome applications i tested properly display their window in sway when started from sway.