diff --git a/backend/src/langs.ts b/backend/src/langs.ts
index 98703dd..bb68fc9 100644
--- a/backend/src/langs.ts
+++ b/backend/src/langs.ts
@@ -1243,6 +1243,19 @@ int main() {
       input: `p $x`,
     },
     template: `p "Hello, world!"
+`,
+  },
+  gel: {
+    aliases: ["genius"],
+    name: "GEL",
+    repl: "genius",
+    main: ".geniusinit",
+    createEmpty: ``,
+    run: "genius",
+    scope: {
+      code: `x = 123 * 234`,
+    },
+    template: `print("Hello, world!")
 `,
   },
   go: {
diff --git a/scripts/docker-install-phase3b.bash b/scripts/docker-install-phase3b.bash
index 5dc5822..319b897 100755
--- a/scripts/docker-install-phase3b.bash
+++ b/scripts/docker-install-phase3b.bash
@@ -54,6 +54,9 @@ gap
 # GDB
 gdb
 
+# GEL
+genius
+
 # Go
 golang