It's just the Go packages that are x64. Been running on x86 since version 4.x ish with no issues. I am moving to a new x64 server though shortly, so this maybe a moot point for me at least. (I'm the tweeter btw!)
@JobV In my mind I always thought that only omnibus are x64 only.
As for the installation guide we have two options, either point the x86 users to download the golang compiler from the site or provide another block with the x86 package. I can do it if you want.
@axil I think we should just write 'if you have an i386 machine instead of amd64, please go to golang.org/dl to download Go binaries for your platform'.