Technology is the minimum gate length that can be fabricated. This is also the minimum feature size that can be fabricated. If gate is equal to minimum feature size than it is not possible to fabricate feature smaller than gate length. But smaller gate length leads to higher leakage current. In some special case where power is critical gate length can be made larger than width to save power.
I think above posts did not answer your question. W/L ratio completely depends on your choice. If you use digital circuitry you will not change L from minimum value since you care about speed and density.
For analog design W and L are up to you. I use quite often W smaller than L. W/l=1 is no problem at all.