It is the Al Jafilyia(sp?) one after the trade center stop on the red line. The stop is just by the etisalat building - a little walk to the gate but not far, sorry don't know which gate it is.
Do you know which metro station is closest to one of the gates at Zaabeel Park? and which gate it is... RTA website is a bit confusing when you don't know exactly where you are going!
TIA