It's worse than that. Maps was a 2004 acquisition[0]. Where 2 developed the base map tech originally, and Google acquired them and a couple of other companies, combining them to launch Maps in 2005.
Android, also, was an acquisition[1]. Google bought them in 2005 and launched in 2008.
Even their core ad business is mostly-acquired from DoubleClick. Even the "personalized search" they're known for involved an acquisition! Really, the list is amazing.[2]
[0] https://medium.com/@lewgus/the-untold-story-about-the-foundi...
[1] https://venturebeat.com/2010/10/27/google-exec-android-was-b...
[2] https://en.wikipedia.org/wiki/List_of_mergers_and_acquisitio...