Hi Peter,
Thanks reaching out with your Crio Pro WordPress theme questions.
I normally wouldn’t recommend inputting your Google Analytics tag into the header of your theme because their is a great chance you could lose the tag when then theme updates.
I’d recommend using a plugin such as Monster Insights to add your Tracking Code. Monster insights has a very simple auto-connect on-boarding process.
I hope this helps. Please let us know if you have any other questions for you.