[DuckyScript not opening Run command Or Terminal - Ubuntu 16.04 Xenial]

REM Description: Open "Run a Command", run gnome-terminal
DELAY 3000
ALT F2
DELAY 1500
STRING gnome-terminal
ENTER
DELAY 750
STRING echo Hello World
ENTER

Forgot the ENTER for this script, sanity checked and still no dice.

[DuckyScript not opening Run command Or Terminal - Ubuntu 16.04 Xenial]

Hello, I just got my Rubber Ducky and started toying with it, but can't get the desired outcome on my Ubuntu Xenial machine.

System: Ubuntu 16.04 Xenial 4.4.0-70-generic

Compile Steps: Deleted inject.bin, ran java -jar /path/to/duckencode.jar -i hello.txt, created an inject.bin.
Script:

REM Description: Open "Run a Command", run gnome-terminal
DELAY 3000
ALT F2
DELAY 1500
STRING gnome-terminal
DELAY 750
STRING echo Hello World
ENTER

Outcome: The ALT F2 part of the script not working, the delays, the string inputs and enter keys are working.

Test: Opened gEdit, focused the window and replayed payload.

Output: 

gnome-terminal
echo Hello World

Expectation:  Gnome Terminal to open, focused, and write echo Hello World then return key.

Alternative: Tried CTRL ALT t, without STRING gnome-terminal ENTER and does not work either.

Alt Script:

REM Description: Open Terminal
DELAY 3000
CTRL ALT t
DELAY 1500
STRING echo Hello World
ENTER

Test: Opened gEdit, focused the window and replayed payload.
Output: echo Hello World

Expectation: Gnome Terminal to open, focused, and write echo Hello World then return key.

No Gnome Terminal opened, just did STRING echo Hello World ENTER in gEdit.
Is there something I am doing wrong? Is there something I should know?
Any help or suggestions would be appreciated.
I will be switching over to Windows tomorrow, but just thought this was odd and worth mentioning for Ubuntu 16.04.