I think it is a north vs south thing. Republican Charlie Baker seems to be supporting trans right at will, something I doubt many southern Republicans would do openly and strongly. Its more of a region thing then a wing thing. On LGBT the national Democrats are very supportive, while the GOP is split between a more supportive northern members and strongly opposed southern member. Granted, this isnt new. Before like 1968 it was the Republicans that near universally supported civil rights whereas the Democrats were split with a supportive northren wing and a hard core opposed southern wing.