2007 City Golf - Head Gasket or Condensation within the Engine

2007 City Golf - Head Gasket or Just Condensation within the Engine?

I have a 2007 City Golf. I just purchased it with 121,000km / 75,000 miles I checked the radiator cap and there is goop! :( Could it be because of the low milage and condensation has built up or should I go ahead and test the head gasket? I haven't had any problems with it overheating so far but it has been a cold canadian winter. Please don't make fun of the flower on the hood :).

Thanks in advance everyone!