You can use your E Gift card as a ticketing system. You can put a limit on the number of gift cards "tickets" you have to sell.

Ensure you have toggled off the unlimited quantity available. You will need to input teh number of tickets you have available. 

Update.

You will have to manually make your ticket unavailable after your event day. If you sell out, then customers will no longer be able to purchase. 

All money will be taken via your payment gateway Stripe/ Square.