gkCols 2 col different widths

Hi.

Is it possible to make a 2 col article to be divided in 35/65% in width so that first column would be slightly narrower?

I already have a bunch or similar articles made with 2 col layout but they are 50/50% ratio.

Thanks in advance!

This is how the layout is done, but with source editor you might try to add some html and inline styling to force different column sizes.