Nopes. Go 1.4.2 was released with GCC 5.1 (April 22, 2015). This release is just bugfixes.
Thanks; you're right. I read the 5 series general release notes as if it were for 5.2.
Re:GCC 5.2 released
by bsdetector on Thursday July 16, 2015 @12:43PM
(#9898316)
I'm more interested in why GCC still doesn't have a D frontend.
Back when people were criticizing Google for acquiring GCC developers and then adding their own Go language I think they promised to add D in like 4.6 or something like that.
I don't know anything about that, but there's already a D front end for GCC: http://gdcproject.org
EDIT: I'm wrong. That was GCC 5.1.