Yea most laptops have integrated gpu's. Exceptions are gaming laptops. Some mid-high end laptops have it though. 9 times out of 10, you cant change it easily.
If your laptop has one, you would need to take apart the laptop to find it.
And it is VERY expensive of you can swap. You have to have a very high dollar laptop to do it... But of you do you bought it with a high end gpu. And by the time you need to upgrade.... you need a new laptop