Fourth grade classroom was in a trailer for me. Other than that, I had a Economics class and a Geometry class in HS that were held in trailers. My Economics teacher, Mr. Bird, was awesome (had a spectacular temper). He threw my bookbag out of the trailer once due to him catching me throwing snap and pops at him.
The gifted area of my elementary school was indoors and not near the trailers at all. My high school pretty much consisted of gifted students from all over Jacksonville. Everyone had to take a class in a trailer eventually. We even had a mud parking lot next to the trailers. It is the city's college prep magnet school, so it didn't have gifted. It did have the International Baccalaureate program, which I stopped doing after 9th grade (IB students have NO life).