Pass IAB Global Privacy Platform (GPP) consent strings into Google Ad Manager ad requests for US state privacy compliance
domain: support.google.com/admanager · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Implement or configure a GPP-compliant CMP that generates a GPP string covering the relevant US jurisdictions
Append gpp={gpp string} and gpp_sid={gpp section id} as URL parameters on ad requests sent to Google Ad Manager
Confirm the GPP section strings are limited to the jurisdictions Ad Manager accepts: US National, California, Colorado, Connecticut, Florida, and Virginia
Verify Ad Manager applies restricted data processing when the string signals an opt-out of sale, sharing, or targeted-advertising processing, per the specific state's rule
For EEA/UK/Switzerland traffic, continue using a certified CMP's IAB Europe TCF integration instead
Known gotchas
Ad Manager began supporting GPP National v2 in September 2025 while continuing to support v1 — sending the deprecated GPP v1.0 spec string can trigger a GPP_ERROR_STRING_IS_DEPRECATED_SPEC error, so confirm which version your CMP emits
Ad Manager does not accept IAB Canada TCF, the US Privacy (CCPA) string, Utah's state string, or IAB Europe TCF strings within the gpp parameter — only the six listed US jurisdictions are supported there
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