I installed the Go, then added path requirements to my .bash_profile
:
export PATH=$PATH:/usr/local/go/bin
export GOPATH
The problem was as James Henstridge commented, for some reason there was an issue with my user directory name case. Even though the directory is lowercase, I had to make it capitalized.
This worked:
GOPATH=/Users/Daryl/go
This didn't:
GOPATH=$HOME/go
However, since moving to a rMBP from my iMac, I had no problems whatsoever setting up Go, so, to this day, I'm not sure what was going on, but in that instance the capitalization fixed it.