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Google Tag Manager · Specialist implementation

Google Tag Manager, server-side, consent-aware, marketing-stack-integrated.

GTM specialist implementation across the 121 Group client book. Server-side container for post-iOS signal quality, consent-aware tag firing (APP + GDPR), GA4 + Meta CAPI + Google Ads enhanced conversions, BigQuery-driven event reconciliation. The plumbing layer that makes the rest of the marketing stack actually work.

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What a proper GTM implementation includes

Four GTM layers, run as one stack.

Server-side container

Server-side GTM where it matters

Server-side GTM for post-iOS signal quality, Meta CAPI deduplicated browser + server events, Google Ads enhanced conversions server-side, GA4 server-side measurement protocol where browser-side is unreliable. Hosted on AU-region Google Cloud, monitored, version-controlled.

Consent management

APP + GDPR-aware consent-mode

Consent-aware tag firing, Australian Privacy Principles for AU-resident traffic, GDPR for international consumer brands, consent-mode-V2 wired into Google + Meta. No data leaks if the user doesn't consent. Documented per-client consent matrix.

Event taxonomy

Marketing-stack-aligned event model

Event taxonomy aligned to the actual marketing stack, GA4 events, Meta CAPI events, Google Ads enhanced conversions, Klaviyo events, LinkedIn Insight Tag events. One event definition flows to every downstream tool. Documented in a per-client measurement plan.

BigQuery reconciliation

GTM events → BigQuery → revenue reconciliation

GTM event stream → GA4 → BigQuery, reconciled to actual storefront GMV (Shopify / WooCommerce) or booking-system revenue (HotDoc / Cliniko) via offline-conversion upload. Real revenue, not platform-attributed phantom-revenue. Marketing attribution →

Where it shows up in client work

Where GTM runs today.

Healthcare · 9 sub-brands

For Health

Cross-domain GTM + GA4 + server-side stack across 9 sub-brands. Booking-system revenue reconciliation via offline-conversion upload.
Consumer · WooCommerce

Glicks Furniture

WooCommerce + Meta CAPI server-side via custom GTM container. Multi-state ecom GMV reconciliation.
Consumer · Shopify

Rose-Hip Vital

Dual-domain Shopify GTM stack, Meta CAPI server-side, Google Ads enhanced conversions, market-specific consent-mode for AU vs international traffic.
ENGAGEMENT SHAPE
  • Commercials: Block Hours or Foundation retainers, disclosed hourly pool. Management fees are named lines, agreed up front. Pricing →
  • First 30 days: access, audit and strategy lock-in with the senior strategist who runs the account.
  • Days 30 to 90: full delivery cadence live, first performance review, scope confirmed against the cap.
  • Who delivers: a senior strategist plus the specialist pod for this service. Month to month, no lock-ins.

Need a proper GTM implementation?

Thirty-minute call. We'll look at your current GTM container state, your server-side gap, your consent posture, and your event-taxonomy alignment.

Book a Discovery