GDPR is not really a technology problem. It's a legal issue as Sven says, and its also a business (as in not just IT) process issue.
There isn't "one weird trick to being GDPR compliant" that anyone can tell you; rather your business needs to be assessing its own specific behaviours (e.g. as you're talking about G Suite apps can you get legal assurance from Google about where data is stored, how its processed, etc), carrying out risk assessments of its own specific procedures and drawing up its own specific actions as a result of that.
Nobody here could reliably answer a question by saying "click this button on a google settings page somewhere and you're magically insured against GDPR issues".
You need to have various policies around the capture, use, storage and destruction of personal data and this applies whether or not that data is stored on a server or on bits of paper inside a physical filing cabinet.
If anything, this is a legal issue imo: can google give you assurance that it will process data you store there in accordance with your policies.