How many oGCD can I press at once?

[HealerGuy]

I believe you can set up a Macro to use an oGCD 0.5 seconds after using a previous oGCD.

So you can hit the GCD, hit you button for using 2 oGCD's back to back, then hit your next button for your next GCD.
In theory, that would cut back 1 button press.

I am not very good with Macros though and never really use them so this might just be wrong too.