We present GTT v3.24, a consolidating release extending v3.20 with ten improvements across four areas. (1) Formal derivations: β_KK exact coefficient derived: c = 8·√((1−e^{−2π})/6) = 3.27 (CGK 2001); SNR shown to be normalization-independent (§2.5.2). Δτ_void=1 bridge P2→P6 made explicit: 0.21 × 2.0 × e^{4/3} = 0.687 (§16.8.10.3). GW bulk scalar mass m_b derived from subleading GW correction: δ=(m_b/k)²·π²/4 (§16.8.9.8). T_bulk=T_HP confirmed as non-free parameter (§9.3). (2) Corrections: Eq.(99b) τ_Hartmann corrected from 5 ns (dimensionally inconsistent) to 2.2 ps = d_crossover/(2c); no 'factor 4 from RS two-brane geometry' (§13.5). Phase 2 hardware: larger, not smaller, junctions than Phase 1 (E_J=397 GHz, I_c=800 nA, A_J=2.7 µm²); exact transmon parameters derived (§19.3.1). Two editorial errors corrected: 'GW correctise' typo and Phase 1/2 label in §19 result box. (3) New content: GW detectability: four concrete instruments at 144.8 GHz with SNR>1 in under 1 s (SIS 35K: SNR=137; ALMA Band 4 75K: SNR=64; Simons Observatory 30K: SNR=160; CMB-S4 25K: SNR=190). ARCADE-2 quantitative analysis: GTT signal 8000× stronger than ARCADE excess at 48.3 GHz; no causal connection (§16.2). (4) RS-AdS5 QNM correction: τ_RS = 1.32·τ_FL = 1.9 ps; C_RS = C_brane·C_warp = 1.075·1.228 = 1.32 (§13.1.1). All prior results of v3.20 unchanged.