We study an asymptotically safe Grand Unified theory by adding (many) gauged vector-like fermions. Using large number-of-flavour (Nf) summation techniques, we show that all the gauge couplings, scalar Quartic couplings and Yukawa couplings can achieve an interacting ultraviolet fixed point. At Infrared, both asymptotically safe Pati-Salam model and Trinification model can match the Standard Model couplings at the electroweak scale. Phenomenological implications such as interesting gravitational wave signals generated through strong first order phase transition will be also discussed.
