You should never add something coming from Facebook without quite some hesitation. Their mantra "move fast and break things" broke more things than they could have imagined. GraphQL isn't great, it isn't even average. It's actually pretty terrible. It's just another query language and actually you don't need it. Steer clear from it.
Don't add GraphQL without understanding what you're getting into. I wouldn't use it in the same 'latest frictionless' context that the article mentions.