In the Gold Account FAQ board it says

"More Shops/Galleries - You can have up to 6 shops/galleries (non-GA users can have up to 4)."

I only activated a 3 month long GA account using the Loyalty Box. When the 3 months expire, what will happen to my extra shops/galleries? Will I have to delete them or will the items be deleted?

The shops will stay and work normally, but if you delete one you will need a gold account to create another again. The same goes for items, you can have more than the normal account limit but you can't add more.

Thank you for the info!