You could use a Go "project" that is in fact the $GOPATH, like so:

    |-- projects
          |-- project_0
          |-- project_1
          |-- project_2
          |-- go
               |-- src 
               |-- pkg 
               |-- bin
          |-- project_4
          |-- project_5

Your other projects would then not be affected at all.

Or consider using a tool like `gb` (https://github.com/constabulary/gb) that does not depend on $GOPATH. (But ensure to understand the caveats of this tool before switching to it.)