01 - Line the bottom of a 9-inch springform pan with parchment paper and set aside.
02 - Combine graham cracker crumbs, melted butter, and sugar in a medium bowl until evenly moistened. Press firmly into the bottom of the prepared pan. Refrigerate while making the filling.
03 - Sprinkle powdered gelatin over 3 tbsp cold water in a small bowl. Let stand for 5 minutes to bloom.
04 - Beat cream cheese in a large bowl until smooth. Add Greek yogurt, powdered sugar, vanilla extract, and lemon juice. Beat until creamy and fully incorporated.
05 - Microwave the bloomed gelatin for 15 seconds until completely dissolved. Let cool slightly, then whisk into the cheesecake mixture until well combined.
06 - Pour the filling over the chilled crust and smooth the top with a spatula. Refrigerate for 2 hours until firmly set.
07 - Dissolve the fruit-flavored gelatin in 1 cup boiling water, stirring thoroughly. Add 1/2 cup cold water and mix. Let cool to room temperature without allowing it to set.
08 - Gently pour the cooled jello over the set cheesecake layer. Refrigerate for at least 2 additional hours until the jello is completely firm.
09 - Run a thin knife around the edge of the pan before releasing the springform. Garnish with fresh berries or fruit slices if desired. Slice and serve chilled.