Overheating issues VU ute

[Ingle94]

Got a vu ute v6. When driving its perfectly fine but once im stopped in traffic, the temperature gauge starts to climb and doesnt stop until i start moving again and get the air flowing through the bay again. In the last 6 months I've changed radiator, water pump and thermostat and full system flush. Im thinking head gasket but not sure.

 

[Immortality]

Engine temp will rise when stationary but the thermofan(s) should cut in and bring it back down. Have you checked the thermofans are working?