General Relativity exhibits asymptotic divergences in singular regimes [a(t → 0) = 0, r → 0], identifying the spacetime continuum as the direct causal agent of these pathologies. This work formalizes the Global Inhomogeneity Domains (GID) framework, establishing a self-supporting architecture where the basal domain D₀ (Φ₀) constitutes the minimal finite infrastructure [a(t → 0) = Φ₀ ≠ 0] upon which domains D₁ and D₂ emerge as coupled self-consistent solutions. Under this paradigm, the speed of light is not a metric prohibition (Friedmann pathology), but the maximum structural flow capacity defined by the basal gradient: c = |∇Φ₀|. Potential-Induced Dispersion (universal Shapiro effect) provides empirical verification of photon deceleration in gradients. The model resolves the Hubble Tension (35 km/s/Mpc dipole) and explains JWST-observed galactic maturity (z ≥ 14) through structural progenitors and directed baryogenesis.