Answer
Yes, the Gremlins sequel was released in the same decade as the original film. The sequel, Gremlins 2: The New Batch, was released in 1990, just two years after the original film was released in 1984. Both films were directed by Joe Dante and starred Zach Galligan and Phoebe Cates. The sequels were not as well-received as the original film, but they still had a cult following.