You'd probably get best value by creating a quicklist entry or two to open a maxed terminal, one of a specific size or what ever valid gnome-terminal option(s) you choose inc. below saved & load

As far as your question you could do that in a fashion by saving to a config file before closing the terminal, (gnome-terminal --save-config=term.txt & then altering the launch command to load from that file, (gnome-terminal --load-config=term.txt) or thru quicklist entry(s)

So as an example for 11.04/11.10, note the geometry command is adjustable. In example am showing most useful quicklist options, what show up is determined by what's on the X-Ayatana-Desktop-Shortcuts= line in order listed or in 12.04 by what's on the Actions= line

Am not suggesting you use all, just examples of what you can do. If you were to use a load & save options then note that when saving a config ALL open instances are saved

gedit ~/.local.share/applications/gnome-terminal.desktop

[Desktop Entry]

Name=Terminal

Comment=Use the command line

TryExec=gnome-terminal

Exec=gnome-terminal

Icon=utilities-terminal

Type=Application

X-GNOME-DocPath=gnome-terminal/index.html

X-GNOME-Bugzilla-Bugzilla=GNOME

X-GNOME-Bugzilla-Product=gnome-terminal

X-GNOME-Bugzilla-Component=BugBuddyBugs

X-GNOME-Bugzilla-Version=2.32.1

Categories=GNOME;GTK;Utility;TerminalEmulator;

StartupNotify=true

X-Ubuntu-Gettext-Domain=gnome-terminal

X-Ayatana-Desktop-Shortcuts=New;Large;Maxed;Save;Load;



[New Shortcut Group]

Name=New Terminal

Exec=gnome-terminal

TargetEnvironment=Unity



[Large Shortcut Group]

Name=New Large Terminal

Exec=gnome-terminal --geometry=140x34

TargetEnvironment=Unity



[Maxed Shortcut Group]

Name=Maxed Terminal

Exec=gnome-terminal --maximize

TargetEnvironment=Unity 



[Save Shortcut Group]

Name=Save Config

Exec=gnome-terminal  --save-config=term.txt

TargetEnvironment=Unity



[Load Shortcut Group]

Name=Load Config

Exec=gnome-terminal  --load-config=term.txt

TargetEnvironment=Unity`

Starting in 12.04 X-Ayatana-Desktop-Shortcuts= is no longer being used, Actions= is the new way. Small example below

Name=Terminal

Comment=Use the command line

TryExec=gnome-terminal

Exec=gnome-terminal

Icon=utilities-terminal

Type=Application

X-GNOME-DocPath=gnome-terminal/index.html

X-GNOME-Bugzilla-Bugzilla=GNOME

X-GNOME-Bugzilla-Product=gnome-terminal

X-GNOME-Bugzilla-Component=BugBuddyBugs

X-GNOME-Bugzilla-Version=3.4.0.1

Categories=GNOME;GTK;Utility;TerminalEmulator;

StartupNotify=true

OnlyShowIn=GNOME;Unity;

Keywords=Run;

Actions=New;Large;Maxed;Save;Load;

X-Ubuntu-Gettext-Domain=gnome-terminal



[Desktop Action New]

Name=New Terminal

Exec=gnome-terminal

OnlyShowIn=Unity



ect.