JSFiddle - React, Tailwind, and code Playground

HTML

<div class="gdr_wrapper">
  <table id="details_gdr">
    <tr>
      <th>G</th>
      <th>D</th>
      <th>R</th>
    </tr>
    <tr>
      <th>0/2</th>
      <th>1/3</th>
      <th>1/2</th>
    </tr>
  </table>
</div>

CSS

#details_gdr {
    height: 50px;
    line-height: 25px !important;
    margin-top: 3px;
    border-collapse: collapse;
}

#details_gdr tbody tr:not(:last-child) {
    height: 25px;
    border-bottom: 1px solid #D0E0EA;
    font-size: 1.4em;
}

#details_gdr tbody tr:not(:last-child) th + th::before {
    color: #D0E0EA;
    content: '|';
    font-size: 0.6em;
    position: relative;
    top: -2px;
    left: -7px;
}

#details_gdr tbody tr th {
    width: 28px;
    text-align: center !important;
}