diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 94a9f4a..073bc30 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -9,7 +9,7 @@ on:
 
 jobs:
   tests:
-    name: ${{ matrix.version }} on ${{ matrix.os }} ${{ matrix.cache && '(cache)' || '' }}
+    name: ${{ matrix.version }} on ${{ matrix.os }} ${{ matrix.cache && '(cache)' || '' }} ${{ matrix.cache && '+gcc' || '' }}
     runs-on: ${{ matrix.os }}
     defaults:
       run:
@@ -25,6 +25,7 @@ jobs:
           - latest # actual version
           - 2.4.1 # specified version
         cache: [true, false]
+        gcc: [true, false]
     steps:
       - uses: actions/checkout@v4
 
@@ -34,6 +35,7 @@ jobs:
         with:
           version: ${{ matrix.version }}
           cache: ${{ matrix.cache }}
+          gcc: ${{ matrix.gcc }}
 
       - name: outputs
         run: |
diff --git a/README.md b/README.md
index 1ce02b1..d3fad8e 100644
--- a/README.md
+++ b/README.md
@@ -10,8 +10,10 @@ Also installs arm-gcc gnu toolchain.
 ## Parameters
 
 - `version` - Specified version of the SDK. Optional. Default value is `latest`.
-- `cache` - Cache installer. Default by `true`.
+- `cache` - Cache installer. Default is `true`.
 - `custom-url` - Custom URL to the SDK installer. Useful for beta versions. If set, `version` will be ignored.
+- `gcc` - `true` to install `gcc-arm-none-eabi` toolchain, `false` to don't. Default is `true`.
+  (Linux & Windows only. On macOS, the sdk installer installs the toolchain itself.)
 
 
 ## Usage Example
diff --git a/action.yml b/action.yml
index 48c3ea0..70897d4 100644
--- a/action.yml
+++ b/action.yml
@@ -16,6 +16,10 @@ inputs:
     default: "true"
     description: Cache installer.
     required: false
+  gcc:
+    default: "true"
+    description: Install gcc-arm-none-eabi toolchain
+    required: false
   # path:
   #   default: default
   #   description: SDK installation path. Optional.
@@ -117,7 +121,7 @@ runs:
         echo "$PWD/bin" >> $GITHUB_PATH
 
     - name: install gnu-arm-gcc
-      if: runner.os == 'Linux'
+      if: runner.os == 'Linux' && inputs.gcc-arm != 'false'
       shell: bash
       run: |
         sudo apt install -y gcc-arm-none-eabi
@@ -138,7 +142,7 @@ runs:
         echo "$PLAYDATE_SDK_PATH_lOCAL/bin" >> $GITHUB_PATH
 
     - name: install gnu-arm-gcc
-      if: runner.os == 'Windows'
+      if: runner.os == 'Windows' && inputs.gcc-arm != 'false'
       shell: powershell
       run: choco install --no-progress gcc-arm-embedded -y