Coolant leak

I have the car listed above gt.
i see coolant dripping onto the serpentine belt. It is running hotter than usual. Heater blows cold air when sitting still, temperature gauge will go up to 230 then back down and then does it again before heater starts blowing heat. Was on the expressway and temperature gauge said car was overheating, I pulled over and let it sit for 10 minutes. Then I started it to drive to the next exit and gauge was below 200, I drove it home (approximately 15 miles) on the regular surface streets and the gauge never went above 200. When I park the car and turn it off you can hear gurgling in the dash for like 30 seconds. I don't smell antifreeze inside the car and my windows do not fog up inside like it does when the heater core is bad.