CyanogenMod just introduces a new app named 'Gallery Next' to replace the stock Gallery app from AOSP. The new app is under construction but beta version of the app is now available, and you can have that from Play Store. In future versions of CyanogenMod the 'Gallery Next' would be the default gallery app.
Through this app users will be able to see all the pictures in one centralized location. Its features will include integration with Flickr, Picasa (G+), Facebook, and Dropbox, automatic grouping, support for videos, gifs, deduping and many more.
'Todo' list is currently implementing the KitKat's immersive mod UI, editor support, fix all the things and you tell us. The beta version of the app is now available in the Play Store, for installation head over to the below source and follow the instructions.