Are 2005 GTPs (L32) prone to coolant leaks (supercharger or head)?

My sense of smell is not good, but I swear I'm smelling coolant (thought I have for a while, thinking back). I do not notice any film on the interior windows (heater core), and the engine compartment seems smelly.
The oil in the dipstick looks normal, coolant level seems OK, no leaks on the garage floor.

2005 GTP, 128,000 miles.


Thanks