Troubleshooting GET WebRequests to Google API

try 
{
// I'm already able to receive the Access Token from Google and store it so I just need to send a GET request with this token to receive the profile info:
RequestString = "https://www.googleapis.com/plus/v1/people/me?access_token=" + this.GoogleAccessToken;

#region ----- THIS IS ONE METHOD IVE TRIED for making the request -----
WebRequest GGLRequest = WebRequest.Create(RequestString);
GGLRequest.Method = "GET";
//tried with and without the next 3 lines with no difference:
GGLRequest.ContentLength = 0;
GGLRequest.ContentType = "application/json";
GGLRequest.Headers.Add("Authorization", "Bearer");

WebResponse GGLResponse = GGLRequest.GetResponse();
//<code continues for this method>
#endregion

#region ----- THIS IS ANOTHER METHOD WITH SAME RESULT -----
HttpWebRequest GGLRequest = (HttpWebRequest)WebRequest.Create(RequestString);
GGLRequest.Method = "GET";
//again, tried it with and without some or all the following lines
GGLRequest.Host = "www.googleapis.com";
GGLRequest.ContentType = "application/json";
GGLRequest.Headers.Add("Authorization", "Bearer");
GGLRequest.ContentLength = 0;
GGLRequest.UseDefaultCredentials = true;

HttpWebResponse GGLResponse = GGLRequest.GetResponse() as HttpWebResponse;
//<code continues for this other method>
#endregion