...
const (
	filePath = "/<abs/path/to>/gfd"
	content  = `
nvidia.com/gpu.machine=VMware7,1
nvidia.com/gpu.product=Tesla-V100-PCIE-32GB
`
)

func main() {
	for {
		_ = writeFileAtomically(filePath, []byte(content), 0644)
	}
}

// from https://github.com/NVIDIA/k8s-device-plugin/blob/35ad18080eded1889dc1eaee1132debddfd6757c/internal/lm/output.go#L105
func writeFileAtomically(path string, contents []byte, perm os.FileMode) error {
	absPath, err := filepath.Abs(path)
	if err != nil {
		return fmt.Errorf("failed to retrieve absolute path of output file: %v", err)
	}

	absDir := filepath.Dir(absPath)
	tmpDir := filepath.Join(absDir, "gfd-tmp")

	err = os.MkdirAll(tmpDir, os.ModePerm)
	if err != nil && !os.IsExist(err) {
		return fmt.Errorf("failed to create temporary directory: %v", err)
	}
	defer func() {
		if err != nil {
			os.RemoveAll(tmpDir)
		}
	}()

	tmpFile, err := os.CreateTemp(tmpDir, "gfd-")
	if err != nil {
		return fmt.Errorf("fail to create temporary output file: %v", err)
	}
	defer func() {
		if err != nil {
			tmpFile.Close()
			os.Remove(tmpFile.Name())
		}
	}()

	err = os.WriteFile(tmpFile.Name(), contents, perm)
	if err != nil {
		return fmt.Errorf("error writing temporary file '%v': %v", tmpFile.Name(), err)
	}

	err = os.Rename(tmpFile.Name(), path)
	if err != nil {
		return fmt.Errorf("error moving temporary file to '%v': %v", path, err)
	}

	time.Sleep(1 * time.Millisecond) // added for better error reproduction

	err = os.Chmod(path, perm)
	if err != nil {
		return fmt.Errorf("error setting permissions on '%v': %v", path, err)
	}

	return nil
}

...
const filePath = "/<abs/path/to>/gfd"

func main() {
	for {
		_, err := os.ReadFile(filePath)
		if err != nil {
			log.Println(err)
		}
	}
}