Create a google form, create slack app add webhook, add script to google form with updated webhook + connect trigger to the form

google_forms_submission_to_slack_webhook.gs

var POST_URL = "https://hooks.slack.com/services/XXXXXXXXXXX/XXXXXXXXXXX/xxxxxxxxxxxxxxxxxxxxxx";

function onSubmit(e) {
    var form = FormApp.getActiveForm();
    var allResponses = form.getResponses();
    var latestResponse = allResponses[allResponses.length - 1];
    var response = latestResponse.getItemResponses();

    var blocks = [];
    for (var i = 0; i < response.length; i++) {
        var question = response[i].getItem().getTitle();
        var answer = response[i].getResponse();
        blocks.push({
            "type": "section",
            "fields": [
                {
                    "type": "mrkdwn",
                    "text": "*"+ question +"*"
                },
                {
                    "type": "mrkdwn",
                    "text": answer
                }
            ]
        });
    }

    if (blocks.length) {
        var payload = {
            "blocks": blocks
        };

        var options = {
            "method": "post",
            "contentType": "application/json",
            "payload": JSON.stringify(payload)
        };

        UrlFetchApp.fetch(POST_URL, options);
    }
}