This is probably one of the most requested "features" for GPC. And I must admit that it is quite handy.
Here is the code.
<form action="https://www.google.com/accounts/ServiceLoginAuth"
method="post" style="margin: 0px;"> <input name="continue"
value="http://gmail.google.com/gmail" type="hidden"> <input
name="service" value="mail" type="hidden"> <input name="rm"
value="false" type="hidden"> <p style="line-height: 200%;"><input
name="Email" alt="" type="text"> login<br><input name="Passwd"
maxlength="25" alt="" type="password"> password<br><input value="sign
in" type="submit"> </p>
</form>
BE CAREFUL FROM WHAT SITES YOU LOG INTO YOUR ACCOUNT. SOME SITES MAY BE PHISING YOU.
This is just the form, and there will be no title so you will have to add that manually and add something that suits you.
EDIT: I actually came to a conclusion that this might be useful for sort of a utility site, that contains information, feeds, news, and stuff like that and provides to the user. With that said, I removed it from my homepage as it seemed to me that it was just space occupying.