Yes, and gmail if you use, you'r gps/gsm cordinates over the past 3 years and more if you have an android phone.
The scary thing as you pointed out with analytics, even if you have no google account google still hold data on you. If you use a private email server google still have a copy of every email you sent to gmail or received and will hand them over as its associated with you.
I believe they mean: Even if you don't use gmail, but you correspond with other people who do use gmail, the other people's copies of your messages are linked to you and handed over.
It's hard to avoid corresponding with other people who use gmail. But it's even harder, when you realise this includes people using their own private email domains that are handled by the gmail service without your knowledge. Many companies do this, even if it's just for the excellent spam filtering.
The scary thing as you pointed out with analytics, even if you have no google account google still hold data on you. If you use a private email server google still have a copy of every email you sent to gmail or received and will hand them over as its associated with you.