Launching a script in a new gnome-terminal

Question

I am trying to make a script which is supposed to open a new gnome-terminal and issue a command (launch a jetty server).

If I try only : gnome-terminal, a new gnome-terminal is opened.

If I try : gnome-terminal -e ls, I get a warning message :

Option “-e” is deprecated and might be removed in a later version of gnome-terminal.

Use “-- ” to terminate the options and put the command line to execute after it.

Here, the new gnome-terminal is not always opened. If I try this command fast 10 times, maybe 2 terminal will open...

Same if I try with the recommended syntax : gnome-terminal -- ls.

What is the correct way to achieve this?