The only way I am aware of for doing this is to use the My Maps feature of google maps. You can create a public map in My Maps. Add a marker using the toolbar in the map, then use the link button on the top right to get the URL of your public map.
Not sure how this looks on a mobile device, but I assume that it works.
Edit
Ok. So my assumption was incorrect. I tried this out on Android and iPhone and got the following results:
- iPhone - Switches out to the maps application (no option to view in the browser), displays the correct region, but no markers.
- Android - Gives you the option of viewing the URL in the browser or in maps. If you view in the browser, you get the correct region, but no markers.
- Android - If you view on the maps application, you get the correct region and the markers.
So basically not very useful to you. When I have done this in my mobile web apps (not native), I have used static maps. You give up the dynamic functionality, but you get lots of flexibility with what gets rendered on the map.