vue-gapi.blade.php

<template>
  <div class="container">
    <p>sample</p>  
  </div>
</template>

<script>
  export default {
    data () {
      return {
          gapi: null,
      }
    },
    mounted() {
      // window.gapi で取得できる
      this.gapi = window.gapi;
    },
  }
</script>