diff --git a/types/gl/gl-tests.ts b/types/gl/gl-tests.ts
new file mode 100644
index 0000000000..9b0a64b491
--- /dev/null
+++ b/types/gl/gl-tests.ts
@@ -0,0 +1,8 @@
+import createContext = require("gl");
+
+createContext(0, 0); // $ExpectType WebGLRenderingContext & StackGLExtension
+createContext(0, 0, { preserveDrawingBuffer: true }); // $ExpectType WebGLRenderingContext & StackGLExtension
+createContext(0, 0).getExtension("STACKGL_resize_drawingbuffer"); // $ExpectType STACKGL_resize_drawingbuffer | null
+createContext(0, 0).getExtension("STACKGL_destroy_context"); // $ExpectType STACKGL_destroy_context | null
+createContext(0, 0).getExtension("STACKGL_resize_drawingbuffer")!.resize(0, 0); // $ExpectType void
+createContext(0, 0).getExtension("STACKGL_destroy_context")!.destroy(); // $ExpectType void
diff --git a/types/gl/index.d.ts b/types/gl/index.d.ts
new file mode 100644
index 0000000000..ad8a7b5767
--- /dev/null
+++ b/types/gl/index.d.ts
@@ -0,0 +1,21 @@
+// Type definitions for gl 4.1
+// Project: https://github.com/stackgl/headless-gl#readme
+// Definitions by: sjx233 <https://github.com/sjx233>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+interface StackGLExtension {
+    getExtension(extensionName: "STACKGL_resize_drawingbuffer"): STACKGL_resize_drawingbuffer | null;
+    getExtension(extensionName: "STACKGL_destroy_context"): STACKGL_destroy_context | null;
+}
+
+interface STACKGL_resize_drawingbuffer {
+    resize(width: GLint, height: GLint): void;
+}
+
+interface STACKGL_destroy_context {
+    destroy(): void;
+}
+
+declare function createContext(width: number, height: number, options?: WebGLContextAttributes): WebGLRenderingContext & StackGLExtension;
+
+export = createContext;
diff --git a/types/gl/tsconfig.json b/types/gl/tsconfig.json
new file mode 100644
index 0000000000..36e5d3af07
--- /dev/null
+++ b/types/gl/tsconfig.json
@@ -0,0 +1,24 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6",
+            "dom"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "gl-tests.ts"
+    ]
+}
diff --git a/types/gl/tslint.json b/types/gl/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/gl/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }