I bought this little (cheap) GPS module months ago from an indigogo project. I have since received my GPS and was having troubles interfacing it to my APM 2.5.2. I was simply trying to output the serial data into the APM, not porting APM to the skytraq chip.
Here is where I posted my question, http://www.navspark.com.tw/forum/output-to-arducopter. The guys here are very helpful with the info I needed.
It seems that all I needed to do was connect the TXD1 pin (navspark) to the RX pin on the GPS socket (APM) GND to GND and Battery (in) to the 5v output from the GPS socket. Then change the output of the Navspark to 5hz.
I don't know if there is any benefit to running a Navspark over a Ublox, or weather the APM is geared to accept the Beidou sat signals.
If I have provided any wrong information or if you could provide further info, please let me know in comments below.