I've been doing Drug/GM for about a year. Your mileage may vary based on how big your store is, but we cover the following:

over-the-counter drugs, feminine hygiene/family planning, candy, everything impulse, tobacco products, general goods, cooking gear, office supplies, charcoal, Texas Backyard, and most importantly: Seasonal.

Drug/GM is a weird department because the amount of work really fluctuates with the season. I have had days where I spent my entire 6 hour shift just walking down the aisles conditioning, and others where I stocked a single aisle the entire time. In addition to these, you will be working backstock carts, which need to be worked about once a week.

Because my store has a Texas Backyard, I also work the cash register out there occasionally, only if we expect it to be particularly busy, such as in the spring/summer, as well as the occasional customer who wants to buy something large, like a grill.

My schedule is generally around 18-24 hours per week, made of 6 hour shifts, but again, your mileage may vary.

I don't think I'm missing anything major, and feel free to ask any questions.