Why is there a gas smell around the driver rear tire area?

While parked overnight, i come out the next day to check on my armada and it has a strong smell of gasoline around the rear driver's side passenger. I checked the gas cap and it clicks lock. No leaks found under.

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 1
crwdns2934285:0crwdne2934285:0