there is a leak in the fuel line

If the leak is due to a loose clamp on a rubber line, you may be able to tighten it. If it's a damaged steel line, it needs to be replaced. Either way it's a fire hazard and needs attention ASAP. You may have to tow the car to someone who works on Geos or Toyotas for help. If you want to find a specialist, here's a directory link for you: https://repairpal.com/geo-repair-in-petersburg-new-york