ETA: As of 2016/05/18 this broke again, still working out why.
** ETA2: I never got Sublime Text 2 to work properly with GoSublime. However, upgrading to Sublime Text 3 was painless and GoSublime works properly again!**
The fix: Instead of using the Package Manager, manually clone down the git repo and check out and older version (hat tip these folks).
Step 1: Uninstall GoSublime through the Package Manager.
Step 2: Rename or delete the GoSublime folder in
/Users/<USERNAME>/Library/Application\ Support/Sublime\ Text\ 2/Packages.
Step 3: Pull down the GoSublime repo.
Step 4: Check out commit