Gel covers are comfortable for a short time as the weight is spread out over your whole arse. The problem is that most of your arse isn't suitable for weight bearing and will get sore very quickly. Getting a saddle with the right shape and width is the important part as is acclimatising yourself to riding for longer.
Take a few moments to answer the questions that
@I like Skol posted just above, but I'd also add one more, do you currently get a sore arse when riding?
If not then ride for a bit longer than normal and see what happens. If nothing, ride for a bit longer again see what happens. A little bit of discomfort is expected when riding longer than you are used to but if it goes away quickly when getting off the bike or standing up to pedal then it's probably not the saddle it's just acclimatisation.