How to get the ACF Group Field value on corcel / acf?

I am working on Laravel + Wordpress Project by using corcel. but I can't get the ACF group field value like the following.

```
use Corcel\Model\Page;

$homePage = Page::home()->first();
dd($homePage->acf->gig_category_section);
```

above output is null. How can I get the ACF group field value by using corcel/acf?