Well, Gilbert would mistake this case Talos disapproving glance he judged him as tiefling instead off dragged by almost by his ears to be there. But what he said was true; he could had struggled, lied or ran but he decided come even if his big sister dragged along the way. Talos may or may not know why exactly Gilbert decided to step down for being public figure or stay hidden. But it should be obvious; firstborn son of fiendslayer is fiendspawn. What such lovely scandal title for local news and cheer day for all who opposed secretly Gaius and probably heirs :P. Not mention tarnish Gaius so hard build legendary good reputation.