No, it will be NOT 15 times stronger. It would be possible only if Gilese 581 d was same size like Earth. And this is for various physical reasons impossible. So it will be somewhat less gravity on surface.
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No, it will be NOT 15 times
No, it will be NOT 15 times stronger. It would be possible only if Gilese 581 d was same size like Earth. And this is for various physical reasons impossible. So it will be somewhat less gravity on surface.