diff --git a/file-formats/gsmg/README.md b/file-formats/gsmg/README.md
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+++ b/file-formats/gsmg/README.md
@@ -0,0 +1,5 @@
+# GSMG File Format
+
+File | Cardinality | Definition | Schema | Example
+:--- | :--- | :--- | :--- | :---
+`<name>.gsmg.json` | 1 | [`zif_aff_gsmg_v1.intf.abap`](./type/zif_aff_gsmg_v1.intf.abap) | [`gsmg-v1.json`](./gsmg-v1.json) | | [`z_aff_example_gsmg.gsmg.json`](./examples/z_aff_example_gsmg.gsmg.json)
diff --git a/file-formats/gsmg/examples/z_aff_example_gsmg.gsmg.json b/file-formats/gsmg/examples/z_aff_example_gsmg.gsmg.json
new file mode 100644
index 000000000..f4f9f2c9f
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+++ b/file-formats/gsmg/examples/z_aff_example_gsmg.gsmg.json
@@ -0,0 +1,10 @@
+{
+  "formatVersion": "1",
+  "header": {
+    "description": "For testing.",
+    "originalLanguage": "en"
+  },
+  "generalInformation": {
+    "category": "usage"
+  }
+}
diff --git a/file-formats/gsmg/gsmg-v1.json b/file-formats/gsmg/gsmg-v1.json
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index 000000000..39357bf52
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+++ b/file-formats/gsmg/gsmg-v1.json
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+{
+  "$comment": "This file is autogenerated, do not edit manually, see https://github.com/SAP/abap-file-formats for more information.",
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://github.com/SAP/abap-file-formats/blob/main/file-formats/gsmg/gsmg-v1.json",
+  "title": "Metric Group",
+  "description": "Metric Group (GSMG)",
+  "type": "object",
+  "properties": {
+    "formatVersion": {
+      "title": "ABAP File Format Version",
+      "description": "The ABAP file format version",
+      "type": "string",
+      "const": "1"
+    },
+    "header": {
+      "title": "Header",
+      "description": "Header",
+      "type": "object",
+      "properties": {
+        "description": {
+          "title": "Description",
+          "description": "Description of the ABAP object",
+          "type": "string",
+          "maxLength": 60
+        },
+        "originalLanguage": {
+          "title": "Original Language",
+          "description": "Original language of the ABAP object",
+          "type": "string",
+          "minLength": 2
+        },
+        "abapLanguageVersion": {
+          "title": "ABAP Language Version",
+          "description": "ABAP language version",
+          "type": "string",
+          "enum": [
+            "standard",
+            "cloudDevelopment"
+          ],
+          "enumTitles": [
+            "Standard",
+            "ABAP Cloud Development"
+          ],
+          "enumDescriptions": [
+            "Standard",
+            "ABAP cloud development"
+          ],
+          "default": "standard"
+        }
+      },
+      "additionalProperties": false,
+      "required": [
+        "description",
+        "originalLanguage"
+      ]
+    },
+    "generalInformation": {
+      "title": "General Information",
+      "description": "General information",
+      "type": "object",
+      "properties": {
+        "category": {
+          "title": "Category",
+          "description": "Category",
+          "type": "string",
+          "enum": [
+            "availability",
+            "performance",
+            "exception",
+            "configuration",
+            "usage",
+            "selfMonitoring",
+            "metering"
+          ],
+          "enumTitles": [
+            "Availability",
+            "Performance",
+            "Exception",
+            "Configuration",
+            "Usage",
+            "Self Monitoring",
+            "Metering"
+          ],
+          "enumDescriptions": [
+            "Availability",
+            "Performance",
+            "Exception",
+            "Configuration",
+            "Usage",
+            "Self monitoring",
+            "Metering"
+          ],
+          "default": "usage"
+        }
+      },
+      "additionalProperties": false,
+      "required": [
+        "category"
+      ]
+    }
+  },
+  "additionalProperties": false,
+  "required": [
+    "formatVersion",
+    "header",
+    "generalInformation"
+  ]
+}
diff --git a/file-formats/gsmg/type/zif_aff_gsmg_v1.intf.abap b/file-formats/gsmg/type/zif_aff_gsmg_v1.intf.abap
new file mode 100644
index 000000000..2405550b0
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+++ b/file-formats/gsmg/type/zif_aff_gsmg_v1.intf.abap
@@ -0,0 +1,83 @@
+INTERFACE zif_aff_gsmg_v1
+  PUBLIC.
+
+  TYPES:
+
+    "! <p class="shorttext">Category</p>
+    "! Category
+    "! $values {@link zif_aff_gsmg_v1.data:co_category}
+    "! $default {@link zif_aff_gsmg_v1.data:co_category.usage}
+    ty_category             TYPE c LENGTH 10,
+
+
+    "! <p class="shorttext">General Information</p>
+    "! General information
+    BEGIN OF ty_general_information,
+      "! <p class="shorttext">Category</p>
+      "! Category
+      "! $required
+      category TYPE ty_category,
+
+    END OF ty_general_information.
+
+
+  CONSTANTS:
+
+    "! <p class="shorttext">Category</p>
+    "! Category
+    BEGIN OF co_category,
+
+      "! <p class="shorttext">Availability</p>
+      "! Availability
+      availability    TYPE ty_category VALUE 'AVAIL',
+
+      "! <p class="shorttext">Performance</p>
+      "! Performance
+      performance     TYPE ty_category VALUE 'PERFORM',
+
+      "! <p class="shorttext">Exception</p>
+      "! Exception
+      exception       TYPE ty_category VALUE 'EXCEPTION',
+
+      "! <p class="shorttext">Configuration</p>
+      "! Configuration
+      configuration   TYPE ty_category VALUE 'CONFIGURE',
+
+      "! <p class="shorttext">Usage</p>
+      "! Usage
+      usage           TYPE ty_category VALUE 'USAGE',
+
+      "! <p class="shorttext">Self Monitoring</p>
+      "! Self monitoring
+      self_monitoring TYPE ty_category VALUE 'SELFMON',
+
+      "! <p class="shorttext">Metering</p>
+      "! Metering
+      metering        TYPE ty_category VALUE 'METERING',
+
+    END OF co_category.
+
+
+
+  TYPES:
+
+    "! <p class="shorttext">Metric Group</p>
+    "! Metric Group (GSMG)
+    BEGIN OF ty_main,
+
+      "! $required
+      format_version      TYPE zif_aff_types_v1=>ty_format_version,
+
+      "! <p class="shorttext">Header</p>
+      "! Header
+      "! $required
+      header              TYPE zif_aff_types_v1=>ty_header_60_cloud,
+
+      "! <p class="shorttext">General Information</p>
+      "! General information
+      "! $required
+      general_information TYPE ty_general_information,
+
+    END OF ty_main.
+
+ENDINTERFACE.
diff --git a/file-formats/gsmg/type/zif_aff_gsmg_v1.intf.json b/file-formats/gsmg/type/zif_aff_gsmg_v1.intf.json
new file mode 100644
index 000000000..a9790e334
--- /dev/null
+++ b/file-formats/gsmg/type/zif_aff_gsmg_v1.intf.json
@@ -0,0 +1,7 @@
+{
+  "formatVersion": "1",
+  "header": {
+    "description": "GSMG AFF Type (Metric Group)",
+    "originalLanguage": "en"
+  }
+}