What happens when a visitor's browser sends a Global Privacy Control signal? Does it automatically reject everything?
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When navigator.globalPrivacyControl === true, OptinStack records gpc: true. By default, all optional consent categories start as false. Plans with advanced GPC controls can configure which optional categories the signal rejects.
The necessary category remains true. GPC is included in consent records and OptinStack also pushes optinstack_gpc_signal_detected to the GTM dataLayer. Test the resolved behavior with window.OptinStack.gpc and window.OptinStack.choices after the runtime is ready.
Documentation: Global Privacy Control and Consent Mode dataLayer events.