This is awesome! I've been looking for new ways to meet/find developers in my area. Are you looking to add new filters? (Filter by top language, number of stars, etc). I would be really interested in helping you on this
I intended to add filters to the search but ran out of time, it would be a good feature to add. You can check out the repo and have a look at the searching functionality here: https://github.com/sheeehy/GeoGit