If you correctly click on the Gmail login page and browse the source, you can find the ID of the userβs email and login fields.
Then you can use them to write javascript to fill it in automatically and submit.
Here you can check http://techtoggle.com/2009/06/how-to-autologin-into-yahoo-hotmail-lycos-mail/
Edit: it is not used by the languages ββyou spoke about, but its solution is all the same. In addition, although the link URL and article title do not mention gmail, there is a gmail version of javascript on the page
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