Gmail and Google Maps were prototypical 2.0.

Gmail's beta started in 2004, and Google Maps launched in 2005. Google's IPO was in 2004, so Web 2.0 products played no part in its enormous early growth.

Gmail had a fundamental part in Googles IPO.

And the term 2.0 was coined in 1999.

Right, but the term and the concept didn't really take off until years later. From https://en.wikipedia.org/wiki/Web_2.0:

> The term "Web 2.0" was coined by Darcy DiNucci, an information architecture consultant, in her January 1999 article "Fragmented Future" [...] her "2.0" designation refers to the next version of the Web that does not directly relate to the term's current use.

> The term Web 2.0 did not resurface until 2002.

Google's first big Web 2.0 products were GMail (beta launched in 2004, just before Google's IPO) and Google Maps (2005).