diff --git a/RNScreens.podspec b/RNScreens.podspec
index 4960724bbc..2f2f083d4a 100644
--- a/RNScreens.podspec
+++ b/RNScreens.podspec
@@ -2,7 +2,8 @@ require "json"
 
 package = JSON.parse(File.read(File.join(__dir__, "package.json")))
 
-gamma_project_enabled = ENV['RNS_GAMMA_ENABLED'] == '1'
+# Gamma is opt-out: enabled unless RNS_GAMMA_ENABLED is explicitly '0'.
+gamma_project_enabled = !(ENV['RNS_GAMMA_ENABLED'] == '0')
 new_arch_enabled = ENV['RCT_NEW_ARCH_ENABLED'] == '1'
 debug_logging_enabled = ENV['RNS_DEBUG_LOGGING'] == '1'
 
diff --git a/android/build.gradle b/android/build.gradle
index d3ede154b4..6905917356 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -34,8 +34,9 @@ def areDebugLogsEnabled() {
     return project.hasProperty("rnsDebugLogsEnabled") && project.rnsDebugLogsEnabled == "true"
 }
 
+// Gamma is opt-out: enabled unless rnsGammaEnabled is explicitly "false".
 def isGammaEnabled() {
-    return project.hasProperty("rnsGammaEnabled") && project.rnsGammaEnabled == "true"
+    return !(project.hasProperty("rnsGammaEnabled") && project.rnsGammaEnabled == "false")
 }
 
 def resolveReactNativeDirectory() {