When I use 3DGS I work within MapBuilder, I have my custom extended version with some RTS stuff slowly evolving, so if I add some stuff to the basic editor part, I will update it.

In parallel I try to port my work to UE4, what is going also slowly because of the significant differences between the engines, and because of the lack of free time recently... Probably I will keep some prototyping work in 3DGS even if I do my game development with UE4.