do they have gasoline

Yes

Yes there is. At times the lines do get long for it though.

There is a gas station at this Costo.

Yes. There is a costco gas station at this Huntington Beach Costco. Vehical lanes moves quite fast except during evening rush hours. Only Gasoline available. No Diesel sold here.

Gas at Costco gasoline. Not every Costco wholesale has a gas station in the premises

Yes but expect to wait 4ever to save 5cents.