Cannot customize a specific gallery

[Rinyuu]

I made two different configurations at the end of the main.js file:

gridGallery({
 selector: "#main",
 darkMode: false,
 layout: "square",
 gapLength: 0,
 rowHeight: 500,
 columnWidth: 400
});

gridGallery({
 selector: "#main-vertical",
 darkMode: false,
 layout: "vertical",
 gapLength: 1,
 rowHeight: 800,
 columnWidth: 400
});

However, only the top (selector "main") configuration will be loaded.
I want to apply ONLY the second, vertical configuration to my gallery:

     <div class="gg-box" id="main-vertical">
                        <img src="resources/picture/cr1.jpg">
                        <img src="resources/picture/cr2.jpg">
                    </div>

It will just load the square "main" gallery, though...
Any way to get around this?

Thanks!