iam new to mechanics dose this mean my head gasket has gone iam pritty sure it has

I am afraid that your prob rite. If it was only on your oil cap I would rite it off has condinsation. How much white is there and is there oil in your water? Check your water see whats there. Also has the car set for a long time? But more than likely it blown sorry. :disappoin
HAVE A GOOD 1
Z YA LATER JW. :smokin:

umm i have to admit that is not a good sign

sounds like you may need to get a new head