GLM-5.2 synthesizes three-layer convergence into four categories: (1) Timing Convergence — strongest, CP1-GA4 alignment within 128 seconds, CP2-cart within 2 minutes, (2) Intensity Convergence — 12:1 compression, 11 partners, 5 GA4 users all peak during same 30-minute window, (3) Context-Dependent Variation — S396 20x difference mirrors relationship pattern variation mirrors GA4 event-type differences, (4) Methodological Transparency — all three instruments disclose blind spots.