Google Consent Mode v2
Complete guide and automatic implementation
Google Consent Mode is mandatory for all websites with GA4 and Google Ads. Consentio sets it up automatically — no code, no manual configuration.
What is Google Consent Mode v2?
Google Consent Mode v2 is a technology that connects your Cookie banner with Google services (GA4, Google Ads, GTM). It allows Google tags to operate in compliance with GDPR by telling them whether the user has given Consent for Cookies.
Since March 2024, GCM v2 has been mandatory for all websites in the EU. Without it:
- You will lose data in Google Analytics 4
- Remarketing in Google Ads will not work
- You will not be able to create ad audiences
- You risk compliance issues
Why do you need GCM v2?
Google Consent Mode v2 is not just about compliance. It is a tool for preserving your data.
Data preservation
Up to 70% measurement accuracy through conversion modelling even when cookies are declined.
GDPR Compliance
Full compliance with European legislation and Google requirements.
Working remarketing
Google Ads and remarketing work correctly thanks to consent signals.
Automatic implementation
No manual configuration. Consentio sets everything up for you.
Basic vs Advanced mode
Consentio uses Advanced mode for maximum data preservation with full GDPR compliance.
| Feature | Basic | AdvancedConsentio |
|---|---|---|
| Data collection without consent | No | Anonymised pings |
| Conversion modelling | No | Yes |
| Data preservation on decline | 0% | Up to 70% |
| Remarketing audience | With consent only | Modelled audience |
| GDPR Compliance | Yes | Yes |
How to activate GCM v2 with Consentio
Automatic implementation without modifying GTM or code.
Sign up
Create a Consentio account and add your website.
Insert the script
Copy one line of code into your website header.
Automatic detection
Consentio automatically detects Google tags and sets up GCM v2.
Done!
GCM v2 Advanced mode is active. Your data is safe.
Frequently asked questions about GCM v2
What is Google Consent Mode v2?
Google Consent Mode v2 is an updated version of the technology that allows Google services (GA4, Google Ads) to operate in compliance with GDPR. It communicates with the cookie banner and adjusts tag behaviour based on user consent.
Is Google Consent Mode v2 mandatory?
Yes, since March 2024, GCM v2 has been mandatory for all EU websites using Google Analytics 4 or Google Ads. Without it, you will lose data and remarketing will not work.
What is the difference between Basic and Advanced mode?
Basic mode blocks all Google tags until consent is given — you lose all data. Advanced mode sends anonymised pings without cookies, enabling conversion modelling and preserving up to 70% of data.
How does Consentio implement GCM v2?
Consentio automatically detects Google tags on your website and sets up GCM v2 Advanced mode. Everything works immediately after installation without the need for manual configuration or code changes.
What happens to my GA4 data when cookies are declined?
With GCM v2 Advanced mode, Google uses conversion modelling to estimate missing data. This preserves approximately 70% measurement accuracy even when cookies are declined.
Do I need to modify Google Tag Manager?
No, with Consentio you do not need to modify GTM or any other code. Our solution automatically communicates with GTM and sets consent states for all Google tags.
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