Since this article was published, we've made significant improvements. Pixel Manager now includes a built-in Google Tag Gateway Proxy that works directly from your WordPress installation — no Cloudflare, no external services, no additional infrastructure costs required.
👉 Read the updated article: Google Tag Gateway Proxy: First-Party Tracking Built Right Into WordPress
The information below is still accurate, but the new built-in proxy makes setup even easier for everyone, regardless of your hosting setup.