Well, "Go in" and "Go into" have the same meaning yes. But they're both tricky. ~"Go in" I never EVER hear unless It's used as a demand (Someone else telling you to "go in" something) ~ If you were talking about yourself you would normally say "Going into" "Going in" or "Going inside" ~Also, they are usually said as "Going in" "Going into" "Going inside" etc.(Unless another verb was used with is (eg: will, would, should, want to, etc) Examples: Go in- Go in(inside) the store. Go in(inside) the house Go in(inside) the building. (Someone else telling you to go in~) Go(going) into- I am going into the building. I will go into the building. I am going to your house. I will go to your house. I probably confused you, this was so hard to explain haha!