Not any more than usual. As far as Gboard is concerned. i don't trust Google or any other closed source keyboard for that matter. i don't want it phoning home by granting it network access.

Gboard collects various types of user data to improve its features and personalize the keyboard experience. Specifically:

Typing data: Gboard collects data on the words, phrases, and characters users type to improve predictive text and spelling/grammar corrections. However, Google claims it does not retain or send any data about individual keystrokes.

Language data: It collects information on what languages users switch between to enhance multilingual typing support.

Device & account data: Basic device information and Google account details are collected for personalization and to sync settings/data across devices.

Usage data: Data on how users interact with the keyboard, what features they enable/disable, and for how long they use it each day.

While this data collection aims to improve the user experience, it does mean Gboard knows a significant amount about a user's typing habits and patterns.

I'm especially cautious about keyboard apps because they are useful keyloggers. It wouldn't take much for a closed app to secretly collect all text, and text is super cheap to store and transmit. I trust their sandboxing just fine, but sandboxing doesn't solve every problem and shouldn't be used as a crutch or excuse to install software that is likely to be dangerous.

The idea, in my opinion, is to have the sandboxing for apps you generally trust just in case. Not to install bad software like Gboard.