Hi,
I have worked with gmail api and automation before, and I have rich experience with MySQL.
I ave understood your requirement, and I can confidently complete it within a few hours, and I can start now.
I have developed e-mail autoresponder and have enough knowledge on Gmail and MySQL. I am over sure that I will be able to complete your project successfully. I can code with raw php, oop, codeigniter, Laravel. I will do that according to your advice.