diff --git a/pySim/apdu/global_platform.py b/pySim/apdu/global_platform.py
new file mode 100644
index 0000000..bdba24e
--- /dev/null
+++ b/pySim/apdu/global_platform.py
@@ -0,0 +1,57 @@
+# coding=utf-8
+"""APDU definition/decoder of GlobalPLatform Card Spec (currently 2.1.1)
+
+(C) 2022 by Harald Welte <laforge@osmocom.org>
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>.
+"""
+
+from pySim.apdu import ApduCommand, ApduCommandSet
+
+class GpDelete(ApduCommand, n='DELETE', ins=0xE4, cla=['8X', 'CX', 'EX']):
+    _apdu_case = 4
+
+class GpStoreData(ApduCommand, n='STORE DATA', ins=0xE2, cla=['8X', 'CX', 'EX']):
+    @classmethod
+    def _get_apdu_case(cls, hdr:bytes) -> int:
+        p1 = hdr[2]
+        if p1 & 0x01:
+            return 4
+        else:
+            return 3
+
+class GpGetDataCA(ApduCommand, n='GET DATA', ins=0xCA, cla=['8X', 'CX', 'EX']):
+    _apdu_case = 4
+
+class GpGetDataCB(ApduCommand, n='GET DATA', ins=0xCB, cla=['8X', 'CX', 'EX']):
+    _apdu_case = 4
+
+class GpGetStatus(ApduCommand, n='GET STATUS', ins=0xF2, cla=['8X', 'CX', 'EX']):
+    _apdu_case = 4
+
+class GpInstall(ApduCommand, n='INSTALL', ins=0xE6, cla=['8X', 'CX', 'EX']):
+    _apdu_case = 4
+
+class GpLoad(ApduCommand, n='LOAD', ins=0xE8, cla=['8X', 'CX', 'EX']):
+    _apdu_case = 4
+
+class GpPutKey(ApduCommand, n='PUT KEY', ins=0xD8, cla=['8X', 'CX', 'EX']):
+    _apdu_case = 4
+
+class GpSetStatus(ApduCommand, n='SET STATUS', ins=0xF0, cla=['8X', 'CX', 'EX']):
+    _apdu_case = 3
+
+ApduCommands = ApduCommandSet('GlobalPlatform v2.3.1', cmds=[GpDelete, GpStoreData,
+                              GpGetDataCA, GpGetDataCB, GpGetStatus, GpInstall,
+                              GpLoad, GpPutKey, GpSetStatus])