.gp-gallery-picture-zoom {
    border: 1px solid #bbb;
    margin: -6px 0 0 -6px;
    position: absolute;
    z-index: 100;
    padding: 5px;
    background: white;
    box-shadow: 0 0 10px #999;
}
.gp-gallery-picture-hover {
    box-shadow: 1px 1px 5px #333;
}