GD using 96 PPI as default image resolution

Hello,

When resizing an image using GD, the default imageresolution PPI) is 96. =
When resizing an image using Imagick, the default image resolution (PPI) =
is 72. Would it be possible to change GD to use 72 as the default image =
resoltion (PPI). I ask this because the default image resoltion (PPI) =
for the internet is 72.

Thank you.=