golang go How to install dependency packages in workspace

golang How to install dependency packages in workspace
a)
Create workspace directory structure
$mkdir mygoproject
$cd mygoproject
$mkdir bin
$mkdir src
$mkdir pkg

b)
Export path of workspace and bin directory.
$export GOPATH=$HOME/golang_tuto/mygoproject
$export PATH=$GOPATH/bin:$PATH

c)
Install dependency packages in workspace:

d)
Then check bin, src and pkg directories fo workspace.
$ls mygoproject/bin
$ls mygoproject/src
$ls mygoproject/pkg