The Optima is not a gel-cell battery. It has the electrolite captured in a special "fabric" material wound in the cells. They are great batteries, though.
As far as I know the gel-cell(gelantinous electrolite) battery (if anyone still makes them) and the dry-cell batteries still have not been proven in the "real" world as being able to survive and perform as well as the standard wet-cell batteries.
When I was in the auto parts business, every dry or gel style that came along was tried in our markets and very quickly dropped from the product line as a "problem" merchandise. We continued to sell standard batteries and Optimas.
A standard battery will last a long time, maybe even outlive it's warrantee, if the cells are kept full, the terminals are kept clean, the cables are maintained and replaced as necessary, and it is kept fully charged. The battery in my wife's car is over 5 years old and still in great shape. The battery in my son's 57 is over 4 years old and still tiptop.
You should check your electrolite level every month year around to be absolutely safe. Up North perhaps once every 2 months unless the summer is very hot that year.