In your PHP Google Calendar Events I found the DIV area where gce-page-grid is creating the grid with the feeds from the query. I would like to add a custom DIV after the grid is completed. This new DIV will allow a custom CSS for a legend of colors. If I have two feeds, I have two colors. A new high-level way to inform users of what feeds on what dates per se.
I know this needs to be in your module otherwise you can wipe it out on upgrades. Is there a way for me to add custom stuff after the calendar is built to have information at the bottom?