How to move logo image more to left of page?

I'm using an image for the logo, and it always appears close to the middle of the screen. But it should be at the left. Here's the code (default basically) from template.css:

#gkLogo {
margin: 4px 0;
padding: 0;
text-indent: -999em;
text-shadow: none;
width: 140px;
display: block;
float: left;
}
#gkLogo img {
display: block;
margin: 0;
}

How can I move it more to the left? There's a lot of space between it and the edge of my screen.

Hi,
there always be "space" on left, because logo is inside layout rectangle.
Only maybe on notebook screen will be very close to left border.
Screenshot from 17" laptop.