code: def conn_gcp(cred, crid):
      
      gcp_auth_type = cred.get('gcp_auth_type', "S")
      if gcp_auth_type == "A":  # Application Auth
          gcp_crd_ia = CONFIG_DIR + ".gcp_libcloud_a_auth." + cred['gcp_proj_id']
          gcp_crd = {'user_id': cred['gcp_client_id'],
                     'key': cred['gcp_client_sec'],
                     'project': cred['gcp_proj_id'],
                     'auth_type': "IA",
                     'credential_file': gcp_crd_ia}
      else:  # Service Account Auth
          gcp_pem = CONFIG_DIR + cred['gcp_pem_file']
          gcp_crd_sa = CONFIG_DIR + ".gcp_libcloud_s_auth." + cred['gcp_proj_id']
          gcp_crd = {'user_id': cred['gcp_svc_acct_email'],
                     'key': gcp_pem,
                     'project': cred['gcp_proj_id'],
                     'credential_file': gcp_crd_sa}
      driver = get_driver(Provider.GCE)
      try:
          gcp_obj = driver(**gcp_crd)
      except SSLError as e:
          abort_err("\r SSL Error with GCP: {}".format(e))
      except (InvalidCredsError, ValueError) as e:
          abort_err("\r Error with GCP Credentials: {}".format(e))
      return {crid: gcp_obj}
docs: Establish connection to GCP.