diff --git a/.github/workflows/controller.yml b/.github/workflows/controller.yml
index 1eeebf5d317..2b5cc80f00d 100644
--- a/.github/workflows/controller.yml
+++ b/.github/workflows/controller.yml
@@ -35,10 +35,6 @@ jobs:
     needs: build
     if: ${{ !failure() && !cancelled() }}
     uses: ./.github/workflows/gccold2.yml
-  gccold3:
-    needs: build
-    if: ${{ !failure() && !cancelled() }}
-    uses: ./.github/workflows/gccold3.yml
   gccsnapshot_test:
     needs: build
     if: ${{ !failure() && !cancelled() }}
diff --git a/.github/workflows/gccold3.yml b/.github/workflows/gccold3.yml
deleted file mode 100644
index 2dbf32d70d9..00000000000
--- a/.github/workflows/gccold3.yml
+++ /dev/null
@@ -1,84 +0,0 @@
-name: gcc_old3
-
-on: workflow_call
-
-env:
-  MYSQL_DATABASE: 'ragnarok'
-  MYSQL_USER: 'ragnarok'
-  MYSQL_PASSWORD: 'ragnarok'
-  MYSQL_ALLOW_EMPTY_PASSWORD: 'yes'
-  DEBIAN_COMMON_PACKAGES: make zlib1g-dev libpcre3-dev git python3 libzstd-dev
-  SKIP_VALIDATE_INTERFACES: "skip"
-
-jobs:
-  build:
-    runs-on: ubuntu-latest
-    timeout-minutes: 30
-    strategy:
-      matrix:
-        CC: ["gcc-6", "gcc-5", "gcc-4.8"]
-        RENEWAL: [""]
-        CLIENT_TYPE: ["", "--enable-packetver-re", "--enable-packetver-zero"]
-        HTTPLIB: ["", "--with-http_parser=llhttp"]
-        SANITIZER: ["--disable-manager --enable-sanitize=full"]
-        PACKET_VERSION: ["--enable-packetver=20100105", "--enable-packetver=20171018"]
-        LTO: [""]
-        exclude:
-          - PACKET_VERSION: "--enable-packetver=20100105"
-            CLIENT_TYPE: "--enable-packetver-zero"
-
-    # github.head_ref will stop previous runs in the same PR (if in a PR)
-    # github.run_id is a fallback when outside a PR (e.g. every merge in master will run, and previous won't stop)
-    concurrency:
-      group: gccold3-${{ github.head_ref || github.run_id }}_${{ matrix.CC }}_${{ matrix.RENEWAL }}_${{ matrix.CLIENT_TYPE }}_${{ matrix.HTTPLIB }}_${{ matrix.SANITIZER }}_${{ matrix.PACKET_VERSION}}_${{ matrix.LTO }}
-      cancel-in-progress: true
-
-    container:
-      image: ubuntu:18.04
-    services:
-      mariadb:
-        image: mariadb:latest
-        ports:
-          - 33306:3306
-        env:
-          MYSQL_DATABASE: 'ragnarok'
-          MYSQL_USER: 'ragnarok'
-          MYSQL_PASSWORD: 'ragnarok'
-          MYSQL_ALLOW_EMPTY_PASSWORD: 'yes'
-        options: >-
-          --health-cmd="healthcheck.sh --connect --innodb_initialized"
-          --health-interval=5s
-          --health-timeout=2s
-          --health-retries=3
-    env:
-      INSTALL_PACKAGES: ${{ matrix.CC }} mariadb-client libmariadbclient-dev-compat
-      SQLHOST: mariadb
-      CC: ${{ matrix.CC }}
-      CONFIGURE_FLAGS: CC=${{ matrix.CC }} --enable-debug --enable-Werror --enable-buildbot ${{ matrix.RENEWAL }} ${{ matrix.HTTPLIB }} ${{ matrix.CLIENT_TYPE }} ${{ matrix.SANITIZER }} ${{ matrix.PACKET_VERSION }} --enable-epoll
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 1
-
-      - name: info
-        run: |
-          uname -a
-
-      - name: install packages
-        run: |
-          ./tools/ci/retry.sh apt-get update
-          ./tools/ci/retry.sh apt-get install -y -qq $INSTALL_PACKAGES $DEBIAN_COMMON_PACKAGES
-
-      - name: init database
-        run: |
-          ./tools/ci/travis.sh importdb ragnarok ragnarok ragnarok $SQLHOST
-
-      - name: get plugins
-        run: |
-          ./tools/ci/travis.sh getplugins || true
-
-      - name: build
-        run: |
-          ./tools/ci/travis.sh build $CONFIGURE_FLAGS
-
-        # for run default config will show warnings