Previously i was stuck with delete existing gmail contact using google php api so below is that code by which solve the issue of delete the gmail contact:
$headers = array(
'Authorization: OAuth '.$accesstoken
$dech = curl_init();
curl_setopt($dech, CURLOPT_CUSTOMREQUEST, "DELETE");
curl_setopt($dech, CURLOPT_HTTPHEADER, $headers);
$result = curl_exec($dech);
$httpCode = curl_getinfo($dech, CURLINFO_HTTP_CODE);
you can use CURL for delete the gmail code i am explaining above code:
$deleteid is gmail contact id that you receive when you fetch gmail contact from google
$accesstoken is google api token.
and set the delete method.
Please use above code and need any help any where please let me know