From today forward, Gifted "seasons" will be called "series." The premise behind "seasons" was to allow stat/leaderboards/character resets and allow more players to get competitive as well as permit me to add more content to the base game. It has come to my attention it can get mixed up with Season Passes in other popular games. That is a small confusion I would like to correct now.
Gifted does not have Season Passes nor are there any plans for them at this time. The initial purchase of Gifted is all you need to enjoy the game in it's current state and the content I still have planned.
For more information, check out the developer blog at overturnstudios.com