It isn't clear -- is your concern just because of the antifreeze smell? There are a lot of sources of coolant leaks to give you that smell but that doesn't have to mean a blown head gasket.

Or have you pulled the dipsticks for the engine oil and for the transmission fluid? Do you see any "egg cream" (it's what I call the "milky" oil-water emulsion, from a common soda fountain drink :-) on them.

You see oil in the radiator coolant? Or floating scum in the overflow container?

Let us know, and then we'll judge from that point.