diff --git a/src/Adapter/MockServerQuery.php b/src/Adapter/MockServerQuery.php
index 3a4e71d..e051cd9 100644
--- a/src/Adapter/MockServerQuery.php
+++ b/src/Adapter/MockServerQuery.php
@@ -26,9 +26,7 @@ protected function syn(): void
 
         $rdy = $this->getTransport()->readLine();
 
-        if (!$rdy->startsWith(TeamSpeak3::TS3_PROTO_IDENT) && !$rdy->startsWith(TeamSpeak3::TEA_PROTO_IDENT) && !(defined("CUSTOM_PROTO_IDENT") && $rdy->startsWith(CUSTOM_PROTO_IDENT))) {
-            throw new AdapterException("invalid reply from the server (" . $rdy . ")");
-        }
+        $this->validateProtocolGreeting($rdy);
 
         Signal::getInstance()->emit("serverqueryConnected", $this);
     }
diff --git a/src/Adapter/ServerQuery.php b/src/Adapter/ServerQuery.php
index e0ecde2..dde4306 100644
--- a/src/Adapter/ServerQuery.php
+++ b/src/Adapter/ServerQuery.php
@@ -64,13 +64,25 @@ protected function syn(): void
 
         $rdy = $this->getTransport()->readLine();
 
-        if (!$rdy->startsWith(TeamSpeak3::TS3_PROTO_IDENT) && !$rdy->startsWith(TeamSpeak3::TEA_PROTO_IDENT) && !(defined("CUSTOM_PROTO_IDENT") && $rdy->startsWith(CUSTOM_PROTO_IDENT))) {
-            throw new AdapterException("invalid reply from the server (" . $rdy . ")");
-        }
+        $this->validateProtocolGreeting($rdy);
 
         Signal::getInstance()->emit("serverqueryConnected", $this);
     }
 
+    /**
+     * Validates a ServerQuery protocol greeting.
+     *
+     * @param StringHelper $greeting
+     * @return void
+     * @throws AdapterException
+     */
+    protected function validateProtocolGreeting(StringHelper $greeting): void
+    {
+        if (!$greeting->startsWith(TeamSpeak3::TS3_PROTO_IDENT) && !$greeting->startsWith(TeamSpeak3::TEA_PROTO_IDENT) && !$greeting->startsWith(TeamSpeak3::GREENTEA_PROTO_IDENT) && !(defined("CUSTOM_PROTO_IDENT") && $greeting->startsWith(CUSTOM_PROTO_IDENT))) {
+            throw new AdapterException("invalid reply from the server (" . $greeting . ")");
+        }
+    }
+
     /**
      * The ServerQuery destructor.
      *
diff --git a/src/Adapter/ServerQuery/Reply.php b/src/Adapter/ServerQuery/Reply.php
index 68872f8..0209d99 100644
--- a/src/Adapter/ServerQuery/Reply.php
+++ b/src/Adapter/ServerQuery/Reply.php
@@ -300,7 +300,7 @@ protected function fetchError(StringHelper $err): void
     protected function fetchReply(array $rpl): void
     {
         foreach ($rpl as $key => $val) {
-            if ($val->startsWith(TeamSpeak3::TS3_MOTD_PREFIX) || $val->startsWith(TeamSpeak3::TEA_MOTD_PREFIX) || (defined("CUSTOM_MOTD_PREFIX") && $val->startsWith(CUSTOM_MOTD_PREFIX))) {
+            if ($val->startsWith(TeamSpeak3::TS3_MOTD_PREFIX) || $val->startsWith(TeamSpeak3::TEA_MOTD_PREFIX) || $val->startsWith(TeamSpeak3::GREENTEA_MOTD_PREFIX) || (defined("CUSTOM_MOTD_PREFIX") && $val->startsWith(CUSTOM_MOTD_PREFIX))) {
                 unset($rpl[$key]);
             } elseif ($val->startsWith(TeamSpeak3::EVENT)) {
                 $this->evt[] = new Event($val, $this->con);
diff --git a/src/TeamSpeak3.php b/src/TeamSpeak3.php
index d54a49c..e00705d 100644
--- a/src/TeamSpeak3.php
+++ b/src/TeamSpeak3.php
@@ -69,6 +69,16 @@ class TeamSpeak3
      */
     public const TEA_MOTD_PREFIX = "Welcome";
 
+    /**
+     * GreenTeaSpeak protocol welcome message.
+     */
+    public const GREENTEA_PROTO_IDENT = "GreenTeaSpeak";
+
+    /**
+     * GreenTeaSpeak protocol greeting message prefix.
+     */
+    public const GREENTEA_MOTD_PREFIX = "Welcome";
+
     /**
      * TeamSpeak 3 protocol error message prefix.
      */
diff --git a/src/Transport/MockTCP.php b/src/Transport/MockTCP.php
index 2d7f06c..5bd38dd 100644
--- a/src/Transport/MockTCP.php
+++ b/src/Transport/MockTCP.php
@@ -25,7 +25,7 @@ public function connect(): void
             return;
         }
 
-        $this->reply = sprintf("%s\n%s\n", self::S_WELCOME_L0, self::S_WELCOME_L1);
+        $this->reply = sprintf("%s\n%s\n", $this->config['welcome'] ?? self::S_WELCOME_L0, self::S_WELCOME_L1);
         $this->stream = true;
     }
 
diff --git a/tests/Adapter/ServerQuery/ReplyTest.php b/tests/Adapter/ServerQuery/ReplyTest.php
index c793792..4188c4c 100644
--- a/tests/Adapter/ServerQuery/ReplyTest.php
+++ b/tests/Adapter/ServerQuery/ReplyTest.php
@@ -171,4 +171,11 @@ public function testFetchReply()
 
         $this->assertSame(static::$E_SERVERLIST, $reply->toString()->toString());
     }
+
+    public function testFetchReplyRemovesGreenTeaSpeakGreeting(): void
+    {
+        $reply = new Reply([new StringHelper('Welcome to the GreenTeaSpeak ServerQuery interface.'), new StringHelper(static::$S_SERVERLIST), new StringHelper(static::$S_ERROR_OK)]);
+
+        $this->assertSame(static::$E_SERVERLIST, $reply->toString()->toString());
+    }
 }
diff --git a/tests/Adapter/ServerQueryTest.php b/tests/Adapter/ServerQueryTest.php
index e12a116..c4aabfa 100644
--- a/tests/Adapter/ServerQueryTest.php
+++ b/tests/Adapter/ServerQueryTest.php
@@ -89,4 +89,15 @@ public function testRequestTracksCountTimestampAndRuntime(): void
         $this->assertSame('0.0.0.0', $serverQuery->getTransportHost());
         $this->assertSame('9987', $serverQuery->getTransportPort());
     }
+
+    public function testAcceptsGreenTeaSpeakProtocolGreeting(): void
+    {
+        $serverQuery = new MockServerQuery([
+            'host' => '0.0.0.0',
+            'port' => 9987,
+            'welcome' => 'GreenTeaSpeak ServerQuery',
+        ]);
+
+        $this->assertTrue($serverQuery->getTransport()->isConnected());
+    }
 }