they will test your competency, which...when it comes to GNC, you only have to be able to understand english, or at least part of it. If you can read the pill bottle you can work there.
GNC does not test for drugs...nor does it do backround checks, or verify references, or confirm employment
if they did they would realize that most of their staff doesnt understand the products they are selling, have any experience with vitamins , and are only trained to upsell bullshit products noone uses like powdered dandelion extract or aloe vera protein pills
if you are dirty, buy the fuckin masking agent drink and follow directions...i mean shit, if you cant pass a drug test for the place that sells the shit to pass drug tests, than you dont deserve to make the 8.12 an hour they pay and will most likely get them sued because your the type of genius that would sell sugar to a diabetic