Not unless the mast models can be made readable if someone re-exports them from Maya.
More weirdness - GM Viewer can read "flyingdutchman1_mast2.gm". It failed while TOOL was still open and had just said it couldn't read the file. When I pointed TOOL at something else, GM Viewer then successfully read "flyingdutchman1_mast2.gm". The same applies to "flyingdutchman1_mast3.gm". (No, the reverse doesn't work. Pointing GM Viewer at something else, or closing it entirely, does not make TOOL suddenly able to read those files - I tried.) So, "mast2" and "mast3" don't have flags in the new version either, but they do have plenty of "fal" locators.
More weirdness - GM Viewer can read "flyingdutchman1_mast2.gm". It failed while TOOL was still open and had just said it couldn't read the file. When I pointed TOOL at something else, GM Viewer then successfully read "flyingdutchman1_mast2.gm". The same applies to "flyingdutchman1_mast3.gm". (No, the reverse doesn't work. Pointing GM Viewer at something else, or closing it entirely, does not make TOOL suddenly able to read those files - I tried.) So, "mast2" and "mast3" don't have flags in the new version either, but they do have plenty of "fal" locators.