Schedule II drugs are usually narcotic, stimulant,
and depressant drugs. These include drugs such as
Percocet and Ritalin. There are many more.
Schedule III, IV and V Drugs include those containing smaller amounts of certain narcotic and non-narcotic drugs, anti-anxiety drugs, tranquilizers, sedatives, stimulants, and non-narcotic analgesics. Valium, Codeine and Vicodin are some examples and again there are many more.
I'm sure you know that Gabapentin is not a scheduled drug.