They do rin a check on you in case you apply for a job and you are a druggie. Its the mouse and cheese scenario. You can't throw a mouse in a room full of cheese for 8 hours and expect that mouse to not have touched the cheese when you return 8 hours later. He will lay there in a corner duk gevriet...the same with a druggie...keep them away from any and all pharma products. They will get high just by wakling through the warehouse.
Yes, GSK would ensure that potential candidates have provided truthful information regarding their qualifications & previous experience.
Various tests need to be completed
This may take up to 2 - 3 weeks
They do a background check but I'm unsure as to the timeline.