Why does my interior smell like gasoline. No leaks and no warning lights.

No visible leaks you mean!... Have vehicle hoisted and inspected is recommended... Fuel can seep out from top of tank and not drip onto ground .. especially when tank is FULL... Stop and go traffic and/or curvy roads can also aggravate problem due to fuel sloshing... Gasoline smell in cabin is usually the result of a leak!.. While hoisted, can tell where smell is more pronounced... Engine compartment or fuel tank area.