Do I need to create a child theme for a WooCommerce template?

Hi,

I'm trying to re-create a form on my landing page that users can fill and checkout directly. This uses a WooCommerce add-on called a One-Page Checkout.

In my current theme, this was done by creating a custom template in a child theme. I'm trying to avoid creating a child theme with GeneratePress, unless it's necessary.

On this page, WooCommerce says that some themes have WooCommerce support. I know GP does too. Does this mean that I can just put the template directly into the GP theme folders? Or will I need to create a child theme? If so, is there a way to achieve this using Code Snippets?

You can see a link to my current landing page below.

Thanks!