Run command on another(new) terminal window

This might be what you search:

gnome-terminal -e "bash -c \"!!; exec bash\""

or (shortly):

gnome-terminal -x sh -c "!!; bash"

It opens gnome-terminal with your last command (!!) executed and it stays open with the command output in the shell, even with an interactive command like top or less...

In your case its:

gnome-terminal -e "bash -c \"apropos editor; exec bash\""

or

gnome-terminal -x sh -c "apropos editor; bash"

Start another instance of whatever terminal is it you want to run:

xterm -hold -e 'apropos editor' & 

Note the -hold. Most terminals will exit after running the command you feed them. There are already a dozen or so questions about this on the site:

• How can I make a script that opens terminal windows and executes commands in them?
• How to run a script without closing the terminal?

An alternative to that is to use an application which needs to be exited. nano will stay open on its own. If you're just outputting to screen, you could pipe it into less:

xterm -e 'apropos editor | less' & 

That said, in your case (as the other two have said) it does seem easier that you just open another terminal and run your command.