GK4.0 (M526) has the most that I could come up with 8 games:
Black Rhino Slot
Super 8 Line Slot
Diamond Mine Slot
Double Bucks Slot
On The Prowl Slot
Wild Flower Slot
Lion Fish Slot
Super 8 Race Slot
It also has some poker, keno, and blackjack games.
There's a Lock and Roll set that has 20 different slots, no poker or blackjack.
Lock & Roll
Triple Diamond Lock & Roll
Wild Star Red, White, and Blue Lock & Roll
Blackjack Lock & Roll
Double Red, White & Blue Lock & Roll
Double Diamond Lock & Roll
Double Black Tie Lock & Roll
Double Dollars Lock & Roll
Red, White & Blue Lock & Roll
Diamond Tens Lock & Roll
Triple Bonanza Lock & Roll
Ten Times Pay Lock & Roll
Triple Jackpot Lock & Roll
Double American Beauty Lock & Roll
Cats & Dogs Lock & Roll
Double Desire Lock & Roll
Double Double Diamond Lock & Roll
Wild Cherry Lock & Roll
Double Hearts Lock & Roll
Five Times Pay Lock & Roll