Replacing Pantheon-Terminal With Gnome-Terminal

I prefer gnome-terminal so I installed it and removed pantheon-terminal :

sudo apt-get install gnome-terminal 
sudo apt-get purge pantheon-terminal

You can also use Software Center for these actions.

After installation gnome-terminal did not appear in slingshot-launcher....

Open a New Window As Administrator :

Navigate to /usr/share/applications and rightclick Terminal and open with Scratch :

Remove the two lines starting with OnlyShowIn ( or comment them with a # sign, the symbol # signifies a comment to be ignored when it is the first character on a line ).

To add the option Gnome-Terminal Here in the right click menu in Files :

Open a New Window As Administrator as done above and navigate to /usr/share/contractor and Create New File ( name it gnome-terminal.contract ), containing the following lines :

[Contractor Entry]
Name=Gnome-Terminal Here
Icon=
Description=Open in a terminal
MimeType=inode/directory
Exec=gnome-terminal --working-directory=%u
X-GNOME-Gettext-Domain=contractor

To make the menu in gnome-terminal invisible we need to install gconf-editor :
sudo apt-get install gconf-editor

Applications > Configuration Editor > apps > gnome-terminal >profiles > Default > uncheck default_show_menubar

To make the menu visible temporarily just press F10.

http://askubuntu.com/questions/17249/how-do-i-use-the-gconf-editor