diff --git a/.coveragerc b/.coveragerc
index a3e2294e5ab..003d148a702 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -401,7 +401,6 @@ omit =
     homeassistant/components/glances/__init__.py
     homeassistant/components/glances/const.py
     homeassistant/components/glances/sensor.py
-    homeassistant/components/gntp/notify.py
     homeassistant/components/goalfeed/*
     homeassistant/components/goodwe/__init__.py
     homeassistant/components/goodwe/const.py
diff --git a/homeassistant/components/gntp/__init__.py b/homeassistant/components/gntp/__init__.py
deleted file mode 100644
index c2814f86f06..00000000000
--- a/homeassistant/components/gntp/__init__.py
+++ /dev/null
@@ -1 +0,0 @@
-"""The gntp component."""
diff --git a/homeassistant/components/gntp/manifest.json b/homeassistant/components/gntp/manifest.json
deleted file mode 100644
index 3a5f4fb8daa..00000000000
--- a/homeassistant/components/gntp/manifest.json
+++ /dev/null
@@ -1,9 +0,0 @@
-{
-  "domain": "gntp",
-  "name": "Growl (GnGNTP)",
-  "documentation": "https://www.home-assistant.io/integrations/gntp",
-  "requirements": ["gntp==1.0.3"],
-  "codeowners": [],
-  "iot_class": "local_push",
-  "loggers": ["gntp"]
-}
diff --git a/homeassistant/components/gntp/notify.py b/homeassistant/components/gntp/notify.py
deleted file mode 100644
index b3291e25617..00000000000
--- a/homeassistant/components/gntp/notify.py
+++ /dev/null
@@ -1,96 +0,0 @@
-"""GNTP (aka Growl) notification service."""
-import logging
-import os
-
-import gntp.errors
-import gntp.notifier
-import voluptuous as vol
-
-from homeassistant.components.notify import (
-    ATTR_TITLE,
-    ATTR_TITLE_DEFAULT,
-    PLATFORM_SCHEMA,
-    BaseNotificationService,
-)
-from homeassistant.const import CONF_PASSWORD, CONF_PORT
-import homeassistant.helpers.config_validation as cv
-
-_LOGGER = logging.getLogger(__name__)
-
-CONF_APP_NAME = "app_name"
-CONF_APP_ICON = "app_icon"
-CONF_HOSTNAME = "hostname"
-
-DEFAULT_APP_NAME = "HomeAssistant"
-DEFAULT_HOST = "localhost"
-DEFAULT_PORT = 23053
-
-PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend(
-    {
-        vol.Optional(CONF_APP_NAME, default=DEFAULT_APP_NAME): cv.string,
-        vol.Optional(CONF_APP_ICON): vol.Url,
-        vol.Optional(CONF_HOSTNAME, default=DEFAULT_HOST): cv.string,
-        vol.Optional(CONF_PASSWORD): cv.string,
-        vol.Optional(CONF_PORT, default=DEFAULT_PORT): cv.port,
-    }
-)
-
-
-def get_service(hass, config, discovery_info=None):
-    """Get the GNTP notification service."""
-    _LOGGER.warning(
-        "The GNTP (Growl) integration has been deprecated and is going to be "
-        "removed in Home Assistant Core 2021.6. The Growl project has retired"
-    )
-
-    logging.getLogger("gntp").setLevel(logging.ERROR)
-
-    if config.get(CONF_APP_ICON) is None:
-        icon_file = os.path.join(
-            os.path.dirname(__file__),
-            "..",
-            "frontend",
-            "www_static",
-            "icons",
-            "favicon-192x192.png",
-        )
-        with open(icon_file, "rb") as file:
-            app_icon = file.read()
-    else:
-        app_icon = config.get(CONF_APP_ICON)
-
-    return GNTPNotificationService(
-        config.get(CONF_APP_NAME),
-        app_icon,
-        config.get(CONF_HOSTNAME),
-        config.get(CONF_PASSWORD),
-        config.get(CONF_PORT),
-    )
-
-
-class GNTPNotificationService(BaseNotificationService):
-    """Implement the notification service for GNTP."""
-
-    def __init__(self, app_name, app_icon, hostname, password, port):
-        """Initialize the service."""
-        self.gntp = gntp.notifier.GrowlNotifier(
-            applicationName=app_name,
-            notifications=["Notification"],
-            applicationIcon=app_icon,
-            hostname=hostname,
-            password=password,
-            port=port,
-        )
-        try:
-            self.gntp.register()
-        except gntp.errors.NetworkError:
-            _LOGGER.error("Unable to register with the GNTP host")
-            return
-
-    def send_message(self, message="", **kwargs):
-        """Send a message to a user."""
-        self.gntp.notify(
-            noteType="Notification",
-            title=kwargs.get(ATTR_TITLE, ATTR_TITLE_DEFAULT),
-            description=message,
-        )
diff --git a/requirements_all.txt b/requirements_all.txt
index 268bdad0ce7..6ed8342b0e6 100644
--- a/requirements_all.txt
+++ b/requirements_all.txt
@@ -745,9 +745,6 @@ gitterpy==0.1.7
 # homeassistant.components.glances
 glances_api==0.3.4
 
-# homeassistant.components.gntp
-gntp==1.0.3
-
 # homeassistant.components.goalzero
 goalzero==0.2.1