I have uploaded one of my recent projects phpGPS to Github in case there is any interest. It is a php/MySQL based web app for managing GPS entries and generating a Google Maps map which can easily be embedded on webpages.
GPS coordinates can be added to the database by any device that can send an HTTP GET request, which is pretty much anything with internet access. The GPS entries can then be moved, deleted, or have extra details added like a name and comments through the web interface.
I am currently working on a simple Tasker script so that I can easily add entries on a timer or with a button press from my Android phone.
Check it out here
Test Map Embed: