Not everyone wants to always use google's stock input apk, particularly if you have made modifications into AOSP latinime keyboard if your own and want it to propagate through to your roms without sacrificing gesture input (which i have found is quite useful). Well after some digging around there's good news and bad news.
The good news is that the gesture typing is already in the source tree on the java side and can be enabled by changing packages/inputmethods/LatinIME/java/res/values/gesture-input.xml or using the overlay in devices/../mako (not within scope of this post).
As a result, libjni_latinime.so will not contain code to decode the gestures and will not read from the dictionary.
BUT! There is a way! You can drop in replace the lib from "LatinImeGoogle.apk" into your system/lib and you will have your gesture decoder!
The library inside the apk is called "libjni_latinimegoogle.so" under /lib/<arch_type>/ inside the apk. You can extract this library from within android using program like root explorer and on PC using android apktool (http://code.google.com/p/android-apktool/). Rename this shared library to "libjni_latinime.so" to replace the AOSP built one and it will decode the gestures through the AOSP based keyboard.