diff --git a/Userland/Libraries/LibWeb/CMakeLists.txt b/Userland/Libraries/LibWeb/CMakeLists.txt
index 9a3f1aa3392..eec1844af0d 100644
--- a/Userland/Libraries/LibWeb/CMakeLists.txt
+++ b/Userland/Libraries/LibWeb/CMakeLists.txt
@@ -673,6 +673,7 @@ set(SOURCES
     WebAudio/AudioScheduledSourceNode.cpp
     WebAudio/BaseAudioContext.cpp
     WebAudio/DynamicsCompressorNode.cpp
+    WebAudio/GainNode.cpp
     WebAudio/OfflineAudioContext.cpp
     WebAudio/OscillatorNode.cpp
     WebAudio/PeriodicWave.cpp
diff --git a/Userland/Libraries/LibWeb/Forward.h b/Userland/Libraries/LibWeb/Forward.h
index c0c92abed15..ab0cc5f346d 100644
--- a/Userland/Libraries/LibWeb/Forward.h
+++ b/Userland/Libraries/LibWeb/Forward.h
@@ -700,6 +700,7 @@ class AudioParam;
 class AudioScheduledSourceNode;
 class BaseAudioContext;
 class DynamicsCompressorNode;
+class GainNode;
 class OfflineAudioContext;
 class OscillatorNode;
 class PeriodicWave;
diff --git a/Userland/Libraries/LibWeb/WebAudio/GainNode.cpp b/Userland/Libraries/LibWeb/WebAudio/GainNode.cpp
new file mode 100644
index 00000000000..ca37d3a7b42
--- /dev/null
+++ b/Userland/Libraries/LibWeb/WebAudio/GainNode.cpp
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/WebAudio/AudioParam.h>
+#include <LibWeb/WebAudio/BaseAudioContext.h>
+#include <LibWeb/WebAudio/GainNode.h>
+
+namespace Web::WebAudio {
+
+JS_DEFINE_ALLOCATOR(GainNode);
+
+GainNode::~GainNode() = default;
+
+JS::NonnullGCPtr<GainNode> GainNode::create(JS::Realm& realm, JS::NonnullGCPtr<BaseAudioContext> context, GainOptions const& options)
+{
+    return construct_impl(realm, context, options);
+}
+
+// https://webaudio.github.io/web-audio-api/#dom-gainnode-gainnode
+JS::NonnullGCPtr<GainNode> GainNode::construct_impl(JS::Realm& realm, JS::NonnullGCPtr<BaseAudioContext> context, GainOptions const& options)
+{
+    // FIXME: Invoke "Initialize the AudioNode" steps.
+    return realm.vm().heap().allocate<GainNode>(realm, realm, context, options);
+}
+
+GainNode::GainNode(JS::Realm& realm, JS::NonnullGCPtr<BaseAudioContext> context, GainOptions const& options)
+    : AudioNode(realm, context)
+    , m_gain(AudioParam::create(realm, options.gain, NumericLimits<float>::lowest(), NumericLimits<float>::max(), Bindings::AutomationRate::ARate))
+{
+}
+
+void GainNode::initialize(JS::Realm& realm)
+{
+    Base::initialize(realm);
+    WEB_SET_PROTOTYPE_FOR_INTERFACE(GainNode);
+}
+
+void GainNode::visit_edges(Cell::Visitor& visitor)
+{
+    Base::visit_edges(visitor);
+    visitor.visit(m_gain);
+}
+
+}
diff --git a/Userland/Libraries/LibWeb/WebAudio/GainNode.h b/Userland/Libraries/LibWeb/WebAudio/GainNode.h
new file mode 100644
index 00000000000..59551d77ac3
--- /dev/null
+++ b/Userland/Libraries/LibWeb/WebAudio/GainNode.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2024, Shannon Booth <shannon@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <LibWeb/Bindings/GainNodePrototype.h>
+#include <LibWeb/WebAudio/AudioScheduledSourceNode.h>
+
+namespace Web::WebAudio {
+
+// https://webaudio.github.io/web-audio-api/#GainOptions
+struct GainOptions : AudioNodeOptions {
+    float gain { 1.0 };
+};
+
+// https://webaudio.github.io/web-audio-api/#GainNode
+class GainNode : public AudioNode {
+    WEB_PLATFORM_OBJECT(GainNode, AudioNode);
+    JS_DECLARE_ALLOCATOR(GainNode);
+
+public:
+    virtual ~GainNode() override;
+
+    static JS::NonnullGCPtr<GainNode> create(JS::Realm&, JS::NonnullGCPtr<BaseAudioContext>, GainOptions const& = {});
+    static JS::NonnullGCPtr<GainNode> construct_impl(JS::Realm&, JS::NonnullGCPtr<BaseAudioContext>, GainOptions const& = {});
+
+    JS::NonnullGCPtr<AudioParam const> gain() const { return m_gain; }
+
+protected:
+    GainNode(JS::Realm&, JS::NonnullGCPtr<BaseAudioContext>, GainOptions const& = {});
+
+    virtual void initialize(JS::Realm&) override;
+    virtual void visit_edges(Cell::Visitor&) override;
+
+private:
+    // https://webaudio.github.io/web-audio-api/#dom-gainnode-gain
+    JS::NonnullGCPtr<AudioParam> m_gain;
+};
+
+}
diff --git a/Userland/Libraries/LibWeb/WebAudio/GainNode.idl b/Userland/Libraries/LibWeb/WebAudio/GainNode.idl
new file mode 100644
index 00000000000..ff1d2604022
--- /dev/null
+++ b/Userland/Libraries/LibWeb/WebAudio/GainNode.idl
@@ -0,0 +1,15 @@
+#import <WebAudio/AudioNode.idl>
+#import <WebAudio/AudioParam.idl>
+#import <WebAudio/BaseAudioContext.idl>
+
+// https://webaudio.github.io/web-audio-api/#GainOptions
+dictionary GainOptions : AudioNodeOptions {
+    float gain = 1.0;
+};
+
+// https://webaudio.github.io/web-audio-api/#GainNode
+[Exposed=Window]
+interface GainNode : AudioNode {
+    constructor(BaseAudioContext context, optional GainOptions options = {});
+    readonly attribute AudioParam gain;
+};
diff --git a/Userland/Libraries/LibWeb/idl_files.cmake b/Userland/Libraries/LibWeb/idl_files.cmake
index c68f02d7fdf..7a9e9c32bc4 100644
--- a/Userland/Libraries/LibWeb/idl_files.cmake
+++ b/Userland/Libraries/LibWeb/idl_files.cmake
@@ -306,6 +306,7 @@ libweb_js_bindings(WebAudio/AudioParam)
 libweb_js_bindings(WebAudio/AudioScheduledSourceNode)
 libweb_js_bindings(WebAudio/BaseAudioContext)
 libweb_js_bindings(WebAudio/DynamicsCompressorNode)
+libweb_js_bindings(WebAudio/GainNode)
 libweb_js_bindings(WebAudio/OfflineAudioContext)
 libweb_js_bindings(WebAudio/OscillatorNode)
 libweb_js_bindings(WebAudio/PeriodicWave)