In a saucepan over medium high heat, bring 2 cups water plus the contents of four packs of unflavored gelatin (most boxes include 4 packs per box) to a boil, stirring constantly.
Once the mixture has dissolved and is boiling, remove from heat and pour into a heatproof bowl.
Add rosé, sugar, lime juice, and seltzer water to the bowl and stir to mix.
Gently pour mixture into a pan or molds.
Refrigerate for a few minutes until the mixture starts to set, about 5-10 minutes.
Sprinkle in the strawberries, then return to the refrigerator to chill until firm and ready to slice. This can take about 3-4 hours.