diff --git a/.github/workflows/agent-shield-reusable.yml b/.github/workflows/agent-shield-reusable.yml
index a8ed224cc..24210e4ff 100644
--- a/.github/workflows/agent-shield-reusable.yml
+++ b/.github/workflows/agent-shield-reusable.yml
@@ -32,6 +32,7 @@ on:
         type: string
         default: |
           CLAUDE.md
+          GEMINI.md
           AGENTS.md
       org-standards-ref:
         description: "String AGENTS.md must reference (regex, basic grep -E)"
@@ -89,6 +90,12 @@ jobs:
             status=1
           fi
 
+          if [ -f "GEMINI.md" ] && \
+             ! grep -qi 'AGENTS.md' GEMINI.md; then
+            echo "::error file=GEMINI.md::Must reference AGENTS.md"
+            status=1
+          fi
+
           if [ -f "AGENTS.md" ] && \
              ! grep -qiE "$ORG_REF" AGENTS.md; then
             echo "::error file=AGENTS.md::Must reference org standards ($ORG_REF)"
diff --git a/GEMINI.md b/GEMINI.md
new file mode 100644
index 000000000..823b695c8
--- /dev/null
+++ b/GEMINI.md
@@ -0,0 +1,5 @@
+# GEMINI.md
+
+This repository follows the development and agentic architecture standards defined in [AGENTS.md](AGENTS.md) and [`combsmith/.github/AGENTS.md`](https://github.com/combsmith/.github/blob/main/AGENTS.md).
+
+Read [AGENTS.md](AGENTS.md) for full context, project conventions, testing guidelines, and architectural rules.
diff --git a/scripts/compliance-audit.sh b/scripts/compliance-audit.sh
index 9acef7b78..e3125f5fa 100755
--- a/scripts/compliance-audit.sh
+++ b/scripts/compliance-audit.sh
@@ -2477,6 +2477,32 @@ check_claude_md() {
   fi
 }
 
+# ---------------------------------------------------------------------------
+# Check: GEMINI.md exists and references AGENTS.md
+# ---------------------------------------------------------------------------
+check_gemini_md() {
+  local repo="$1"
+
+  local content
+  content=$(gh_api "repos/$ORG/$repo/contents/GEMINI.md" --jq '.content' 2>/dev/null || echo "")
+
+  if [ -z "$content" ]; then
+    add_finding "$repo" "standards" "missing-gemini-md" "error" \
+      "Missing \`GEMINI.md\` — every repo must have a GEMINI.md that references AGENTS.md" \
+      "AGENTS.md"
+    return
+  fi
+
+  local decoded
+  decoded=$(echo "$content" | base64 -d 2>/dev/null || echo "")
+
+  if ! echo "$decoded" | grep -qi 'AGENTS\.md'; then
+    add_finding "$repo" "standards" "gemini-md-missing-agents-ref" "error" \
+      "\`GEMINI.md\` does not reference \`AGENTS.md\`" \
+      "AGENTS.md"
+  fi
+}
+
 # ---------------------------------------------------------------------------
 # Check: AGENTS.md exists and references org .github/AGENTS.md
 # ---------------------------------------------------------------------------
@@ -3062,7 +3088,7 @@ create_umbrella_issue() {
     "reusable-workflows|Reusable Workflows (disabled_manually)|gh workflow disable <workflow> -R <repo>"
     "action-pinning|Action SHA Pinning|pin actions to SHA in each workflow file"
     "dependabot|Dependabot Configuration|per-repo .github/dependabot.yml"
-    "standards|Agent Standards (CLAUDE.md / AGENTS.md / copilot-setup-steps.yml)|per-repo doc and workflow additions"
+    "standards|Agent Standards (CLAUDE.md / GEMINI.md / AGENTS.md / copilot-setup-steps.yml)|per-repo doc and workflow additions"
   )
 
   local body
@@ -3657,6 +3683,7 @@ main() {
     check_verbatim_stubs "$repo"
     check_centralized_check_names "$repo"
     check_claude_md "$repo"
+    check_gemini_md "$repo"
     check_agents_md "$repo"
     check_copilot_setup_steps "$repo"
     check_copilot_instructions "$repo"
diff --git a/scripts/compliance-remediate.sh b/scripts/compliance-remediate.sh
index 1576c5653..b04b64836 100644
--- a/scripts/compliance-remediate.sh
+++ b/scripts/compliance-remediate.sh
@@ -874,6 +874,10 @@ remediate_finding() {
       report_skip "$repo" "$check" \
         "CLAUDE.md creation/update requires content knowledge — trigger Claude agent on the finding issue"
       ;;
+    standards/missing-gemini-md | standards/gemini-md-missing-agents-ref)
+      report_skip "$repo" "$check" \
+        "GEMINI.md creation/update requires content knowledge — trigger Claude agent on the finding issue"
+      ;;
     standards/missing-agents-md | standards/agents-md-missing-org-ref)
       report_skip "$repo" "$check" \
         "AGENTS.md creation/update requires content knowledge — trigger Claude agent on the finding issue"
diff --git a/standards/agent-standards.md b/standards/agent-standards.md
index c9d465918..6635ad889 100644
--- a/standards/agent-standards.md
+++ b/standards/agent-standards.md
@@ -1,7 +1,7 @@
 # Agent Configuration Standards
 
 Standards for repositories that use AI agent configurations (CLAUDE.md,
-AGENTS.md, BMAD modules, Claude plugins, MCP server configs).
+GEMINI.md, AGENTS.md, BMAD modules, Claude plugins, MCP server configs).
 
 ---
 
@@ -12,6 +12,7 @@ Every repository MUST have:
 | File | Purpose | Compliance Check |
 |------|---------|-----------------|
 | `CLAUDE.md` | Project-level instructions for Claude Code | error if missing |
+| `GEMINI.md` | Project-level instructions for Gemini CLI / Antigravity | error if missing |
 | `AGENTS.md` | Development standards for AI agents | error if missing |
 
 ## Compliance Exemptions — Files Agents Must Not Modify
@@ -37,6 +38,13 @@ to all repos via the `@v1` tag bump.
 - MUST NOT contain overly permissive tool authorization (e.g., `dangerouslySkipPermissions`)
 - SHOULD define project-specific context (tech stack, conventions, key files)
 
+### GEMINI.md Requirements
+
+- MUST reference `AGENTS.md` for development standards
+- MUST NOT contain secrets, API keys, or credentials
+- MUST NOT contain overly permissive tool authorization
+- SHOULD reference the org-level standards (`combsmith/.github/AGENTS.md`) or project-specific context
+
 ### AGENTS.md Requirements
 
 - MUST reference the org-level standards: `combsmith/.github/AGENTS.md`
@@ -82,8 +90,9 @@ generic AgentShield scanner:
 
 | Rule | Severity | Description |
 |------|----------|-------------|
-| `required-files` | error | CLAUDE.md and AGENTS.md must exist |
+| `required-files` | error | CLAUDE.md, GEMINI.md, and AGENTS.md must exist |
 | `claude-reference` | error | CLAUDE.md must reference AGENTS.md |
+| `gemini-reference` | error | GEMINI.md must reference AGENTS.md |
 | `org-reference` | error | AGENTS.md must reference `combsmith/.github/AGENTS.md` |
 | `valid-frontmatter` | error | All SKILL.md files must have YAML frontmatter with `name` and `description` |
 
diff --git a/test/scripts/compliance-audit/gemini-md.bats b/test/scripts/compliance-audit/gemini-md.bats
new file mode 100644
index 000000000..592d8536e
--- /dev/null
+++ b/test/scripts/compliance-audit/gemini-md.bats
@@ -0,0 +1,62 @@
+#!/usr/bin/env bats
+# Unit tests for check_gemini_md in scripts/compliance-audit.sh
+# (standards/agent-standards.md).
+
+bats_require_minimum_version 1.5.0
+
+REPO_ROOT="$(cd "$BATS_TEST_DIRNAME/../../.." && pwd)"
+SCRIPT="$REPO_ROOT/scripts/compliance-audit.sh"
+
+setup() {
+  TMPDIR_TEST="$(mktemp -d)"
+  export TMPDIR_TEST
+}
+
+teardown() {
+  rm -rf "$TMPDIR_TEST"
+}
+
+run_check_gemini_md() {
+  local repo="$1" gemini_body="$2"
+  bash -c '
+    set -euo pipefail
+    export ORG="combsmith"
+    export OUTPUT_DIR="'"$TMPDIR_TEST"'"
+    source "'"$SCRIPT"'"
+    FINDINGS_FILE="$OUTPUT_DIR/findings.json"
+    echo "[]" > "$FINDINGS_FILE"
+    findings_count=0
+    GEMINI_BODY="$2"
+    gh_api() {
+      if [ -z "$GEMINI_BODY" ]; then
+        return 1
+      fi
+      printf "%s" "$GEMINI_BODY" | base64 | tr -d "\n"
+      printf "\n"
+    }
+    check_gemini_md "$1"
+    cat "$FINDINGS_FILE"
+  ' _ "$repo" "$gemini_body"
+}
+
+@test "check_gemini_md: compliant GEMINI.md referencing AGENTS.md produces no finding" {
+  run run_check_gemini_md "incubator" "# GEMINI.md
+See [AGENTS.md](AGENTS.md) and https://github.com/combsmith/.github/blob/main/AGENTS.md"
+  [ "$status" -eq 0 ]
+  [ "$output" = "[]" ]
+}
+
+@test "check_gemini_md: missing GEMINI.md raises missing-gemini-md error" {
+  run run_check_gemini_md "incubator" ""
+  [ "$status" -eq 0 ]
+  [[ "$output" == *'"check": "missing-gemini-md"'* ]]
+  [[ "$output" == *'"severity": "error"'* ]]
+}
+
+@test "check_gemini_md: GEMINI.md without AGENTS.md reference raises gemini-md-missing-agents-ref error" {
+  run run_check_gemini_md "incubator" "# GEMINI.md
+Project instructions without referencing the required file."
+  [ "$status" -eq 0 ]
+  [[ "$output" == *'"check": "gemini-md-missing-agents-ref"'* ]]
+  [[ "$output" == *'"severity": "error"'* ]]
+}
diff --git a/test/scripts/compliance-remediate/routing-messages.bats b/test/scripts/compliance-remediate/routing-messages.bats
index f8aa1de37..6a86a5cf2 100644
--- a/test/scripts/compliance-remediate/routing-messages.bats
+++ b/test/scripts/compliance-remediate/routing-messages.bats
@@ -160,3 +160,27 @@ teardown() {
 
   ! grep -q 'review manually' "$report_dir/skipped.md"
 }
+
+# ---------------------------------------------------------------------------
+# standards/missing-gemini-md & standards/gemini-md-missing-agents-ref
+# ---------------------------------------------------------------------------
+
+@test "missing-gemini-md and gemini-md-missing-agents-ref route to the content-agent path" {
+  for check_name in missing-gemini-md gemini-md-missing-agents-ref; do
+    findings="$(tt_write_finding "broodminder-export" "standards" "$check_name")"
+    report_dir="${TT_TMP}/report-${check_name}"
+
+    GH_TOKEN=fake \
+      FINDINGS_FILE="$findings" \
+      REPORT_DIR="$report_dir" \
+      DRY_RUN=false \
+      run bash "$TT_SCRIPT"
+
+    [ "$status" -eq 0 ]
+
+    grep -q "$check_name" "$report_dir/skipped.md"
+    ! grep -q "$check_name" "$report_dir/remediation-report.md"
+    grep -q 'GEMINI.md creation/update requires content knowledge' "$report_dir/skipped.md"
+    ! grep -q 'review manually' "$report_dir/skipped.md"
+  done
+}