Google maps script modification in wordpress theme.

1) Fix current "OVER_QUERY_LIMIT" error. Currently the script is made to plot the locations of all resent posts on the map. The total amount of the posts will be exceeding 500. Because of the limitations of Google maps api (2500 per IP per day and no more than 10 queries per second) I am getting OVER_QUERY_LIMIT error. I am using lat/lon pair to prevent the error, but I am still getting it so a modification needs to be done. Possibly adding a server side script with a local google map js library. I need 500+ pins to be painted on the map at once. 2) Currently the script is made to plot the locations of all resent posts on the map. Also there is a search option to find posts by a certain search criteria, but the results are not plotted on the map. I would like those results to be plotted on the map too. 3) Plot all the posts by category on the map