I would like to know if there is or will be a support for that.

For GMS 1.4 and GMS≤2.2.5, YYC is supported.

GMS 2.3's YYC is currently pretty buggy - for example, my most recently reported bug, doing

function Some(_item) constructor {
  static item = undefined;
  self.item = _item;
}

will incorrectly modify the static variable instead of assigning into self.

With errors like this, it will take some betas before 2.3 YYC is stable enough to compile GMLive (or most of the "serious" projects, really)

Usually there's little reason to use GMLive on YYC unless for live_execute_string or snippet API (see here on using GMLive for modding and alternatives).

Okay, thanks for the reply!