You can still use the Gmail interface on your phone, of course. You don't have to choose between one or the other but use the tools interchangably with the same Gmail account.
Generate an app-specific token in Gmail and use it to configure git for sending mail. For receiving and commenting on patches, you might be able beat the Gmail interface into submission but it's not going to be convenient, if only for the browser restrictions on calling external commands (like git). Maybe with a browser extension.
In any case, you can use a real mail client in parallel to Gmail (the UI) and use whatever is the most suitable tool for the task at hand.
Generate an app-specific token in Gmail and use it to configure git for sending mail. For receiving and commenting on patches, you might be able beat the Gmail interface into submission but it's not going to be convenient, if only for the browser restrictions on calling external commands (like git). Maybe with a browser extension.
In any case, you can use a real mail client in parallel to Gmail (the UI) and use whatever is the most suitable tool for the task at hand.