how can setup a Google Map. I need a API KEY? or how i can found the just string to put in the code?

www.joomlaplates.com/support/documentation/setup-a-google-map

This works well. But I'm wondering why my map position is showing up under the footer-l position?

Hello,
in my template there is a position "map"?!

Yes, I have the JP_MAXIMUM template, and published a custom module in position 'map.' It appears underneath the 'footer-l' when rendered.

This online document for the template shows the 'map' position as above the footers:
demo.joomlaplates.com/jp_maximum/docs/#module_positions

Hello dlong,
with the information of the template MAXIMUM), the right 'map'-position you used, and maybe a Live URL when available or a screen-hardcopy of the problem, the problem has now become very clear.
You should post again with this information - maybe it's a template-bug?