GPT Gmail and GPT Workspace, using GPT in the google docs, slides, sheets and auto responder for Gmail.
https://workspace.google.com/u/0/marketplace/app/gpt_for_gma...
https://workspace.google.com/u/0/marketplace/app/gpt_for_doc...
The best part is not even about the money but about having a lot of users, democratising GPT and saving a lot of human hours everyday!