go#complete#GetInfo()

init.vim

scriptencoding utf-8
call plug#begin('~/.config/nvim/plugged')
Plug 'fatih/vim-go', { 'for': 'go', 'do': ':GoUpdateBinaries'}
call plug#end()

set laststatus=2
set statusline=
set statusline+=\ %{go#statusline#Show()}
set statusline+=\ %{go#complete#GetInfo()}
" set statusline+=\ %{GoStatus()}

au FileType go set fdm=syntax
let g:go_highlight_functions = 0
let g:go_highlight_methods = 0
let g:go_highlight_structs = 0
let g:go_highlight_operators = 0
let g:go_highlight_build_constraints = 0
let g:go_highlight_trailing_whitespace_error = 1
let g:go_echo_command_info = 0
let g:go_echo_go_info = 0
let g:go_auto_type_info = 0
let g:go_fmt_fail_silently = 1
let g:go_fmt_command = "goimports"
let g:go_list_type = "quickfix"
let g:go_info_mode = 'guru'
let g:go_fmt_experimental = 1
let g:go_def_mapping_enabled = 1
let g:go_def_reuse_buffer = 1

function! GoStatus() 
   let l:status = exists('*go#statusline#Show') ? go#statusline#Show() : ''
   let l:info = exists('*go#complete#GetInfo') ? go#complete#GetInfo() : ''
   return printf('%s %s', l:status, l:info)
endfunction