why arduino can not write to server?
Firstly you only have half of the first line of a GET request. Secondly the half you do have is badly formatted.

A GET request does NOT look like this:

GET http://jalambadani.ir/hadi/signal.php?value=10


A GET request DOES look like this:

GET /hadi/signal.php?value=10 HTTP/1.1
Host: jalambadani.ir
Connection: close
[extra blank line]


If you don't send the correct data you can't expect to get any response back.  You should learn the basics of what you are trying to do instead of just throwing random text a a web server.



Here is a full transcript of a GET request to your URL:

$ telnet jalambadani.ir 80
Trying 185.211.56.148...
Connected to jalambadani.ir.
Escape character is '^]'.
GET /hadi/signal.php?value=10 HTTP/1.1
Host: jalambadani.ir
Connection: close

HTTP/1.1 200 OK
Date: Tue, 25 Jun 2019 22:47:07 GMT
Server: Apache/2
X-Powered-By: PHP/5.6.35
Upgrade: h2,h2c
Connection: Upgrade, close
Vary: User-Agent
Content-Length: 31
Content-Type: text/html; charset=UTF-8

New record created successfullyConnection closed by foreign host.


In code that would be:

SerialGsm.print("AT+CIPSEND=83\r\n");
delay(1000); // I hate that. Look for a proper OK instead.
SerialGsm.print("GET /hadi/signal.php?value=15 HTTP/1.1\r\n");
SerialGsm.print("Host: jalambadani.ir\r\n");
SerialGsm.print("Connection: close\r\n");
SerialGsm.print("\r\n);