Meandering traces necessary for 24-Bit parallel RGB LCD interface?
The rule of thumb is that signals travel at 2ns per foot in standard PCB material. That's roughly half as fast as the speed of light due to the effect of the PCB dielectric material.  180psec per inch is the same thing, and in metric that's 71psec per cm.

Even if you are running with a 100MHz clock, thats 10ns per cycle. So assuming you have half of that as allowable skew for your signals you can have 5ns / 71ps =  70cm mismatch between your signals and still only have 5ns time difference between them. 

So I seriously doubt you have to match your signals that closely in this design. But without more detailed specs I'm only guessing...