Snap include gnome-terminal

[dimitri]

As far as I know there is a simpler way to run a command in a shell, no need to bundle a terminal:

Running a snap in a new terminal

If I understand what you want, I don’t think you need to include a terminal in your snap, or even do much snap-specific. What you need is a .desktop file. For example, does the htop snap do what you want? htop includes a .desktop file. The line Terminal=true tells your system to run htop in a terminal.