You could create a launcher for the script. You would be able to run the script from the activities menu in GNOME (click it) and from the directory the file is saved in. This would be a .desktop file. e.g. Example.desktop:
[Desktop Entry]
Name=Example
Exec=/path/to/executable_script
StartupNotify=true
Terminal=true
Type=Application
Icon=/optional/path/to/icon.png
Make the file executable. When placed in /usr/share/applications or ~/.local/share/applications, GNOME will add the .desktop file to the activities menu.
Now you just have to click the launcher in the activities menu and your script will run. The terminal will close after the script has run to its end.