Consent Mode v2 Payload Inspector & Parameter Debugger
Browser-based debugger that inspects live Google Analytics and Google Ads payloads to verify gcd and gcs Consent Mode v2 compliance.
Understanding the GCD and GCS Parameter Syntax
Under the Digital Markets Act (DMA), Google mandates four distinct consent signals: ad_storage, analytics_storage, ad_user_data, and ad_personalization. The gcd parameter encodes the default and updated states of all four signals into an alphanumeric sequence.
How to cite and attribute this tool
MIT LicenceThis resource is free, open and un-gated under the MIT Open Source Licence. You are encouraged to use, integrate and cite it with attribution:
Geraghty, G. (2026). Consent Mode v2 Payload Inspector & Parameter Debugger. Gordon Geraghty Resources Hub. https://gordongeraghty.com/resources/gtm-analytics/consent-mode-v2-inspector
BibTeX Format
@misc{geraghty_consent_mode_v2_inspector,
author = {Geraghty, Gordon},
title = {Consent Mode v2 Payload Inspector & Parameter Debugger},
year = {2026},
url = {https://gordongeraghty.com/resources/gtm-analytics/consent-mode-v2-inspector},
note = {Head of Performance, Empire Amplify}
}Changelog & Version History
v1.0.0Initial release supporting gcd string tokenisation and DMA mandate compliance rating.