You'd have to imagine that 'G' would be up for it - he's not got that many race miles on the clock this year, and he finished 2nd at the TdF. If Skineos really do take Froome, Bernal and Thomas to the TdF next year, you have to suspect that 'G' is unlikely to win it - the team really seemed to want Froome to get to 5 prior to his accident, and IIRC, they weren't really pretending otherwise even though Thomas was the defending champion, so next year - injuries and recoveries permitting - you'd imagine they'd go with Froome/Bernal leadership. So - to get to the point - if G wants more Grand Tour titles, this years' Vuelta might be a good place to start. At his age his isn't going to win lots of any of them, so if it were me I'd try and get 1 of each.