Should I use a gel saddle or not?
Generally you will find, for getting started a gel seat may help.  As do padded shorts.

However, once you ride regularly, and build some muscle and tolerance around your sit bones, you will find it annoying.

So it is a good gateway drug to getting used to a saddle.  Generally people find that narrower and simpler seats are more comfortable, once you start riding regularly and build up your seat area.