Game mode merging

Hello I am working on my project and I bought an asset from the store to speed thing up a bit but it came with it’s own Gamemode and character but in order for it to work it needs the GM added to the project and I’m using my own so how would I get them to play nice so I can use the asset I bought together with my own gm just copy everything from one GM to another or is there a way to do it?

Your best bet would be making a new map/level, importing the game mode in and setting the gamemode to be the default for that level, then copying what you need out of it.