Gillis, the firstborn of the surname of the gamekeeper. Studied theology and philosophy, which was common for gifted children from the village class. Shortly after he began school, he felt the wish to study drawing. Until the early 19th century, Gillis engaged in teaching drawing in the houses of the high nobility; later, thanks to the recommendations, it was accompanied by the offspring of noble families trips, which greatly assisted the development of his artistic talent. With the Bavarian Prince Ludwig, Dillis not the first time traveling to Italy, especially to Rome and to Sicily. During these trips, Gillis created many watercolor paintings. During his life, Gillis was virtually unknown as an artist.