Hi facchinm,
I downloaded the latest version of Software Serial as you suggested but no joy in getting it to read the GPS data. I tried it on 10/11 and 2/3. With that said I did see some improvement with the performance from my previous comments. It no longer seems to interfere with the gyro and I go not get any of the wild gyrations I mentioned earler. However, the delta t is still longer than it is when using the Hardware serial but not as bad as before. There is a lot more choppiness like there is a built in delay with sending the data out to the port. I am a little out of league on this one and getting software serial to work properly.
Here is a YouTube video of what is happening: GPS Testing on Intel Curie/Arduino 101 - YouTube.
Let me what you think.
Mike