Hi Stephane,
For sure, but it would involve tweaking the CSS a bit.
Right now, the container elements inside GP using the class: .grid-container
Currently, you can choose a pixel value for the width of your container, which applies to the .grid-container class.
You can add your own CSS, and give the grid-container a percent width instead.
Something like this:
body .grid-container {
max-width: 100%;
}
That will make it so the content container is full width.
Let me know if this helps at all 🙂