package main

import (
    "bytes"
    "fmt"
    "log"
    "os/exec"
)

func main() {
    cmd := exec.Command("cmd", "/C", "C:/gopath/src/script/for.exe")

    var out bytes.Buffer
    cmd.Stdout = &out

    err := cmd.Run()
    if err != nil {
        log.Fatal(err)
    }

    fmt.Printf("Вывод: %v\n", out.String())
}