example using github.com/danryan/go-group/os/group

main.go

package main

import (
    "fmt"

    "github.com/danryan/go-group/os/group"
)

func main() {
    g, err := group.CurrentGroup()
    if err != nil {
        panic(err)
    }
    fmt.Printf("group gid=%s, name=%s\n", g.Gid, g.Name)

    g, err = group.LookupGroup("wheel")
    if err != nil {
        panic(err)
    }
    fmt.Printf("group gid=%s, name=%s\n", g.Gid, g.Name)
}