I don’t know if this matters, but I notice you’re missing the Type=Application line in what you wrote above.
Also StartupNotify=true, not Startupnotify=true… (Not sure if that matters either, but it’s worth a try.)
And probably:
Exec=gnome-terminal -x bash -c
not
Exec=gnome-terminal – bash -c
I should point out that I don’t know what I’m doing, really, just basing my tips on what worked for me when I created several apps, which in turn was based on copying instructions from more knowledgeable people on the internet.