diff --git a/src/tasks/mod.rs b/src/tasks/mod.rs
index 168747e..f4eaab3 100644
--- a/src/tasks/mod.rs
+++ b/src/tasks/mod.rs
@@ -1,10 +1,14 @@
 use base64::prelude::*;
 
-use std::collections::HashMap;
+use std::{collections::HashMap, env::args};
 
-use crate::utils::parse::{Responses, Testcase, Testcases};
+use crate::utils::{
+    ciphers::gcm_encrypt_aes,
+    parse::{Responses, Testcase, Testcases},
+};
 use tasks01::{
     block2poly::block2poly,
+    gcm::gcm_encrypt,
     gfmul::gfmul_task,
     poly2block::poly2block,
     sea128::sea128,
@@ -53,6 +57,17 @@ pub fn task_deploy(testcase: &Testcase) -> Result<Value> {
 
             Ok(json)
         }
+        "gcm_encrypt" => {
+            let (ciphertext, auth_tag, l_field, auth_key_h) = gcm_encrypt(args)?;
+            let out_ciph = BASE64_STANDARD.encode(&ciphertext);
+            let out_tag = BASE64_STANDARD.encode(&auth_tag);
+            let out_l = BASE64_STANDARD.encode(&l_field);
+            let out_h = BASE64_STANDARD.encode(&auth_key_h);
+
+            let json = json!({"ciphertext" : out_ciph, "tag" : out_tag, "L" : out_l, "H" : out_h});
+
+            Ok(json)
+        }
         _ => Err(anyhow!(
             "Fatal. No compatible action found. Json data was {:?}. Arguments were; {:?}",
             testcase,
@@ -166,4 +181,24 @@ mod tests {
 
         Ok(())
     }
+
+    #[test]
+    fn test_task_gcm_encrypt_aes_case() -> Result<()> {
+        let json = fs::read_to_string("test_json/gcm_encrypt.json").unwrap();
+        let parsed = parse_json(json).unwrap();
+
+        let expected = json!({ "responses" : { "b856d760-023d-4b00-bad2-15d2b6da22fe" : {
+        "ciphertext": "ET3RmvH/Hbuxba63EuPRrw==",
+        "tag": "Mp0APJb/ZIURRwQlMgNN/w==",
+        "L": "AAAAAAAAAEAAAAAAAAAAgA==",
+        "H": "Bu6ywbsUKlpmZXMQyuGAng=="
+        }}});
+
+        assert_eq!(
+            serde_json::to_value(task_distrubute(&parsed)?).unwrap(),
+            serde_json::to_value(expected).unwrap()
+        );
+
+        Ok(())
+    }
 }
diff --git a/src/tasks/tasks01/gcm.rs b/src/tasks/tasks01/gcm.rs
new file mode 100644
index 0000000..4763d53
--- /dev/null
+++ b/src/tasks/tasks01/gcm.rs
@@ -0,0 +1,26 @@
+use anyhow::{anyhow, Result};
+use base64::prelude::*;
+use serde_json::Value;
+
+use crate::utils::ciphers::gcm_encrypt_aes;
+
+pub fn gcm_encrypt(args: &Value) -> Result<(Vec<u8>, Vec<u8>, Vec<u8>, Vec<u8>)> {
+    let nonce_text: String = serde_json::from_value(args["nonce"].clone())?;
+    let nonce = BASE64_STANDARD.decode(nonce_text)?;
+
+    let key_text: String = serde_json::from_value(args["key"].clone())?;
+    let key = BASE64_STANDARD.decode(key_text)?;
+
+    let plaintext_text: String = serde_json::from_value(args["plaintext"].clone())?;
+    let plaintext = BASE64_STANDARD.decode(plaintext_text)?;
+
+    let ad_text: String = serde_json::from_value(args["ad"].clone())?;
+    let ad = BASE64_STANDARD.decode(ad_text)?;
+
+    let alg_text: String = serde_json::from_value(args["algorithm"].clone())?;
+
+    match alg_text.as_str() {
+        "aes128" => Ok(gcm_encrypt_aes(nonce, key, plaintext, ad)?),
+        _ => Err(anyhow!("No compatible algorithm found")),
+    }
+}
diff --git a/src/tasks/tasks01/mod.rs b/src/tasks/tasks01/mod.rs
index 97ea4d7..d1f3e99 100644
--- a/src/tasks/tasks01/mod.rs
+++ b/src/tasks/tasks01/mod.rs
@@ -1,4 +1,5 @@
 pub mod block2poly;
+pub mod gcm;
 pub mod gfmul;
 pub mod poly2block;
 pub mod sea128;
diff --git a/src/utils/ciphers.rs b/src/utils/ciphers.rs
index 8b5e831..2be30fb 100644
--- a/src/utils/ciphers.rs
+++ b/src/utils/ciphers.rs
@@ -285,10 +285,16 @@ mod tests {
             BASE64_STANDARD.encode(&auth_key_h)
         );
 
-        assert_eq!(BASE64_STANDARD.encode(ciphertext), "");
-        assert_eq!(BASE64_STANDARD.encode(auth_tag), "");
-        assert_eq!(BASE64_STANDARD.encode(l_field), "");
-        assert_eq!(BASE64_STANDARD.encode(auth_key_h), "");
+        assert_eq!(
+            BASE64_STANDARD.encode(ciphertext),
+            "ET3RmvH/Hbuxba63EuPRrw=="
+        );
+        assert_eq!(BASE64_STANDARD.encode(auth_tag), "Mp0APJb/ZIURRwQlMgNN/w==");
+        assert_eq!(BASE64_STANDARD.encode(l_field), "AAAAAAAAAEAAAAAAAAAAgA==");
+        assert_eq!(
+            BASE64_STANDARD.encode(auth_key_h),
+            "Bu6ywbsUKlpmZXMQyuGAng=="
+        );
 
         Ok(())
     }
diff --git a/test_json/gcm_encrypt.json b/test_json/gcm_encrypt.json
new file mode 100644
index 0000000..347475e
--- /dev/null
+++ b/test_json/gcm_encrypt.json
@@ -0,0 +1,14 @@
+{
+  "testcases": {
+    "b856d760-023d-4b00-bad2-15d2b6da22fe": {
+      "action": "gcm_encrypt",
+      "arguments": {
+        "algorithm": "aes128",
+        "nonce": "4gF+BtR3ku/PUQci",
+        "key": "Xjq/GkpTSWoe3ZH0F+tjrQ==",
+        "plaintext": "RGFzIGlzdCBlaW4gVGVzdA==",
+        "ad": "QUQtRGF0ZW4="
+      }
+    }
+  }
+}