Use block variation to set a gallery block gap

Hi!

Yes, it’s possble to supply style values in a block variation like so:

wp.blocks.registerBlockVariation(
    'core/gallery',
    {
        name: 'my-gallery/my-gallery-variant',
        title: 'My Gallery Variant',
        attributes: {
            style: {
                spacing: {
                    blockGap: '2em'
                }
            }
        }
    }
    );

According to this Github issue this would be var:preset|spacing|ecart-2.