diff --git a/templates/gitlab-ci-python-gcp.yml b/templates/gitlab-ci-python-gcp.yml
index 24f4770fddbd39fdce5035d0361c553e42fca110..2a462be960e921064c3831d447d347137c93faac 100644
--- a/templates/gitlab-ci-python-gcp.yml
+++ b/templates/gitlab-ci-python-gcp.yml
@@ -20,23 +20,27 @@ variables:
   GCP_OIDC_PROVIDER: $[[ inputs.gcp-oidc-provider ]]
 
 .python-gcp-adc:
-  - set -e
-  - echo -e "[\\e[1;94mINFO\\e[0m] Installing GCP authentication with env GOOGLE_APPLICATION_CREDENTIALS file"
-  - echo $GCP_JWT > "$CI_BUILDS_DIR/.auth_token.jwt"
-  - |-
-    cat << EOF > "$CI_BUILDS_DIR/google_application_credentials.json"
-    {
-      "type": "external_account",
-      "audience": "//iam.googleapis.com/${GCP_OIDC_PROVIDER}",
-      "subject_token_type": "urn:ietf:params:oauth:token-type:jwt",
-      "token_url": "https://sts.googleapis.com/v1/token",
-      "credential_source": {
-        "file": "$CI_BUILDS_DIR/.auth_token.jwt"
-      },
-      "service_account_impersonation_url": "https://iamcredentials.googleapis.com/v1/projects/-/serviceAccounts/${GCP_OIDC_ACCOUNT}:generateAccessToken"
-    }
+  - |
+    if [[ "$GCP_JWT" ]]
+    then
+      echo -e "[\\e[1;94mINFO\\e[0m] Installing GCP authentication with env GOOGLE_APPLICATION_CREDENTIALS file"
+      echo $GCP_JWT > "$CI_BUILDS_DIR/.auth_token.jwt"
+      cat << EOF > "$CI_BUILDS_DIR/google_application_credentials.json"
+      {
+        "type": "external_account",
+        "audience": "//iam.googleapis.com/${GCP_OIDC_PROVIDER}",
+        "subject_token_type": "urn:ietf:params:oauth:token-type:jwt",
+        "token_url": "https://sts.googleapis.com/v1/token",
+        "credential_source": {
+          "file": "$CI_BUILDS_DIR/.auth_token.jwt"
+        },
+        "service_account_impersonation_url": "https://iamcredentials.googleapis.com/v1/projects/-/serviceAccounts/${GCP_OIDC_ACCOUNT}:generateAccessToken"
+      }
     EOF
-  - export GOOGLE_APPLICATION_CREDENTIALS="$CI_BUILDS_DIR/google_application_credentials.json"
+      export GOOGLE_APPLICATION_CREDENTIALS="$CI_BUILDS_DIR/google_application_credentials.json"
+    else
+      echo '[WARN] $GCP_JWT is not set: cannot setup Application Default Credentials (ADC) authentication'
+    fi
 
 .python-base:
   image: $PYTHON_IMAGE