2003 Pontiac Grand Am Antifreeze leak-car overheating

I have a 2003 grand am gt. My car had been leaking antifreeze in a small compartment on my engine--right below my temp. guage. I have had my thermostat, intake manifold gasket, and water pump replaced recently. My car is still leaking antifreeze in this area. Today my car began to overheat and leaked all of the antifreeze out of my car. It is pouring out of the bottom of my engine--looks like the middle. What could be some other possible causes, as I am tired of spending money on this crappy car and the problem isn't solved. Thanks in advance!