You clearly haven't searched the net or CP for that matter for anything relating to the Google Maps api.
The google api documentation has clear examples.
There are several articles here on CP on how to do it also. here is just one of those;
Google Maps in HTML, ASP.NET, PHP, JSP etc. with ease
make some effort next time. and come back and ask specific problems when you have a problem, not just because you do not know how to use a search engine.