Before anyone mentions it. The WOW addon which is installed by GameCommanderPro is called GameCommandPro. This is to avoid confusion. (in theory)

There are a number of commands that you can type in the chat window to access GCP in game display features.

GCP defines the following / commands (you type the "/" first)

RL

Reloads the UI - It's faster than typing "/script ReloadUI" and is not case sensitive.

Quest

Generates and displays quest status for all characters. Can take a while.

CB

Tells each character to to a buff check. They will report to the main.

GCP

The main GCP command.

The following commands can be used with the "/GCP" prefix:

Buffs

Learn the current buffs. When any are missing from now on, GCP will alert you.

Export

Save spells to disk at next logout or ReloadUI.

Lock

Toggles the locked state of the GCP display elements. Default is locked. When unlocked you can move them. When locked you can click through them.

HUDLabel

sets the labels above each of the health bar columns. This can be a useful reminder of the heal key to use for each health bar (but you can use it as you like). To use this command enter a list of labels (up to 3 chars each) separated by commas

e.g. /gcp HUDLabels F8,F9,F10,F11,F12

Order

Sets the order in which your characters are displayed in GCP. The default is in party order. To use this command, type the character name followed by a comma and the postion (1 - 5) in which you'd like this character to appear

e.g.

/gcp order Char1,1

/gcp order Char2,2

Abandon

all characters abandon the quest which is selected in the main characters quest window

Auto

Toggles quest auto acceptance. Default is on. Usually the slaves will auto accept any quest that doesn't require a decision (including follow on quests). If you're about to accept an escort quest, you may want to turn this feature off

Config

Shows the configuration screen. This allows you to turn the various parts of the display on and off

You can get a reminder of the commands by typing "/GCP Help".