The sim remembers the last setting - so will open it if it was last open, or not open it if it was closed
This is now your normal workflow should be:• Open the GSX menu from the Toolbar icon when first starting Ground services .• Don’t close it from the Toolbar while Ground services are performed, always use the Hot-key or the X icon to close the menu.• Close the menu using the Toolbar icon when you are done with Ground services, usually before take-off.