Yes, gates can lead you to any map, even the same you're inside if wanted. It just need a valid map name and valid coordinates to start on.
Just create a new gate, write in the map name you want it to end up in, and then write the coordinates you want to start when you end up in the other map.
If you want another gate on another place of map leading there you can just make a new gate doing the same thing, but putting other coordinates if wanted.
If you know how 1 gate works, making another one shouldn't be a problem