Xy Grid - Class="Grid-Container"

The docs at describe it a bit:

The grid defaults to the full width of the available space. To contain it horizontally use the grid-container class. The container will be centered and have a max-width equal to your $grid-container setting (1200px by default), along with padding on the left/right equal to half your $grid-container-padding setting.

And the full class is also described at :

To stretch the content to the full width of the available space and remove grid container padding, simply add the class full to your grid-container. Note that this variation is primarily for use for the grid-margin-x - it works with grid-padding-x too, but will work the same as .grid-container.fluid.

The full class removes the padding from the grid container.

  // Grid Container
  .grid-container {
    @include xy-grid-container;

    &.full {
      @include xy-grid-container(100%, 0);
    }
  }

/// @param {Number} $width [$grid-container] - a width to limit the container to.
/// @param {Number} $padding [$grid-container-padding] - paddings of the container.
@mixin xy-grid-container(
  $width: $grid-container,
  $padding: $grid-container-padding
) {
  @include xy-gutters($gutters: $padding, $gutter-type: padding);

The following applies padding-right: 0 and padding-left: 0:

/// Create gutters for a cell/container.
///
/// @param {Number|Map} $gutters [$grid-margin-gutters] - Map or single value for gutters.
/// @param {Keyword} $gutter-type [margin] - Type of gutter to output. Accepts either margin or padding.
/// @param {List} $gutter-position [right left] - The position to apply gutters to. Accepts `top`, `bottom`, `left`, `right` in any combination.
/// @param {Boolean} $negative [false] - Whether to apply the gutter as a negative value. Commonly used for nested grids.
@mixin xy-gutters(
  $gutters: $grid-margin-gutters,
  $gutter-type: margin,
  $gutter-position: right left,
  $negative: false
) {
  $operator: if($negative, '-', '');

  // If we have declared negative gutters, force type to `margin.
  $gutter-type: if($negative, 'margin', $gutter-type);

  // Output our margin gutters.
  @if (type-of($gutters) == 'map') {
    @include -zf-breakpoint-value(auto, $gutters) {
      $gutter: rem-calc($-zf-bp-value) / 2;

      // Loop through each gutter position
      @each $value in $gutter-position {
        #{$gutter-type}-#{$value}: unquote("#{$operator}#{$gutter}");
      }
    }
  }
  @else if (type-of($gutters) == 'number') {
    $gutter: rem-calc($gutters) / 2;

    // Loop through each gutter position
    @each $value in $gutter-position {
      #{$gutter-type}-#{$value}: unquote("#{$operator}#{$gutter}");
    }
  }
}