Google images new format (2020) is unparsable (unlike using `.rg_meta`), this script will parse the first 100 or so images on a google images page and return

googleimages_parse2020format2rg_meta.js

// code to get this:

/**
 * @author github.com/FarisHijazi
 *
 * @returns {{ "id": String, "tu": String, "th": String, "tw": String, "ou": String, "oh": String, "ow": String, "pt": String, "st": String, }[]}
 *  returns a list of objects, these contain the image info
 *
 * how it works:
 *   there's a <script> that contains the images info, the code in it contains `AF_initDataCallback`
 *   this contains the image data
 *
 *
 * example meta object:
 *
 *     meta = {
 *         "id":   "ZR4fY_inahuKM:",                               // ID: corresponds to `data-item-id`
 *         "isu":  "gifs.cc",                                      //
 *         "itg":  0,                                              //
 *         "ity":  "gif",                                          // Image Type
 *         "oh":   322,                                            // Original Height
 *         "ou":   "http://78.media.tumblr.com/....500.gif",       // Original URL
 *         "ow":   492,                                            // Original Width
 *         "pt":   "",                                             // PrimaryTitle
 *         "rh":  "gifs.cc",
 *         "rid":  "nyyV1PqBnBltYM",                               // Referrer ID
 *         "rmt":  0,                                              //
 *         "rt":   0,                                              //
 *         "ru":   "",                                             //
 *         "s":    "Photo",                                        // Site
 *         "st":   "",                                             // Secondary Title
 *         "th":   182,                                            // Thumbnail Height
 *         "tu":   "https://encrypted-tbn0.gstatic.com/images?q\\",// Thumbnail URL
 *         "tw":   278                                             // Thumbnail Width
 *     }
 * 
 */
function getImgMetas() {
    var data = Array.from(document.querySelectorAll('script[nonce]'))
        .map(s => s.innerText)
        .filter(t => /^AF_initDataCallback/.test(t))
        .map(t => {
            try {
                return eval(t.replace('AF_initDataCallback', ''));
            } catch (e) {
                console.error(e);
                return {};
            }
        }).filter(o => o.data)
        .map(o => eval(o.data.toString().replace(/(^function\s*\(\s*\)\s*{\s*return\s*|\s*}\s*$)/g, '')))
        .filter(d => d && d.length && d.reduce((acc, el) => acc || el && el.length))
    ;

    var entry = data[0];
    var imgMetas = entry[31][0][12][2].map(meta => meta[1]); // confirmed
    var metas = imgMetas.map(meta => {
        try {
            const id = meta[1];
            const [tu, th, tw] = meta[2];
            const [ou, oh, ow] = meta[3];

            const siteAndNameInfo = meta[9] || meta[11];
            const pt = siteAndNameInfo[2003][2];
            const st = siteAndNameInfo[183836587][0]; // infolink TODO: doublecheck

            return ({
                'id': id,

                // thumbnail
                'tu': tu,
                'th': th,
                'tw': tw,

                // original
                'ou': ou,
                'oh': oh,
                'ow': ow,

                // site and name
                'pt': pt,
                'st': st,// info link
            })
        } catch (e) {
            console.warn(e);
        }
    }).filter(meta=>!!meta);

    return metas;
}

getImgMetas();