diff --git a/Makefile b/Makefile
index 4fbd32f..bf6cf5e 100644
--- a/Makefile
+++ b/Makefile
@@ -55,6 +55,7 @@ SRCS_CW+=src/specs/av1_isobmff/av1_isobmff.cpp
 SRCS_CW+=src/specs/avif/avif.cpp src/specs/avif/profiles.cpp src/specs/avif/utils.cpp
 SRCS_CW+=src/specs/isobmff/isobmff.cpp
 SRCS_CW+=src/specs/heif/heif.cpp
+SRCS_CW+=src/specs/gimi/gimi.cpp
 SRCS_CW+=src/specs/miaf/miaf.cpp src/specs/miaf/audio.cpp src/specs/miaf/brands.cpp\
   src/specs/miaf/derivations.cpp src/specs/miaf/colours.cpp src/specs/miaf/num_pixels.cpp\
   src/specs/miaf/profiles.cpp
diff --git a/src/specs/gimi/gimi.cpp b/src/specs/gimi/gimi.cpp
new file mode 100644
index 0000000..e47debe
--- /dev/null
+++ b/src/specs/gimi/gimi.cpp
@@ -0,0 +1,55 @@
+#include "core/fourcc.h"
+#include "core/spec.h"
+
+#include <cstring>
+
+static const SpecDesc specGimi = {
+  "gimi",
+  "GEOINT Imagery Media for ISR - NGA.STND.0076",
+  { "isobmff" },
+  {
+    { "Requirement NGA.STND.0076_1.0-02\n"
+      "An NGA.STND.0076_1.0 file shall include the 'geo1' brand in the\n"
+      "compatible brands list.\n",
+      [](Box const &root, IReport *out) {
+        if(root.children.empty() || root.children[0].fourcc != FOURCC("ftyp")) {
+          out->error("'ftyp' box not found");
+          return;
+        }
+
+        auto &ftypBox = root.children[0];
+
+        bool found = false;
+
+        for(auto &brand : ftypBox.syms)
+          if(!strcmp(brand.name, "compatible_brand") && brand.value == FOURCC("geo1"))
+            found = true;
+
+        if(!found)
+          out->error("'geo1' brand not found in 'ftyp' box");
+      } },
+    { "Requirement NGA.STND.0076_1.0-03\n"
+      "An NGA.STND.0076_1.0 file shall include the 'unif' brand in the\n"
+      "compatible brands list.\n",
+      [](Box const &root, IReport *out) {
+        if(root.children.empty() || root.children[0].fourcc != FOURCC("ftyp")) {
+          out->error("'ftyp' box not found");
+          return;
+        }
+
+        auto &ftypBox = root.children[0];
+
+        bool found = false;
+
+        for(auto &brand : ftypBox.syms)
+          if(!strcmp(brand.name, "compatible_brand") && brand.value == FOURCC("unif"))
+            found = true;
+
+        if(!found)
+          out->error("'unif' brand not found in 'ftyp' box");
+      } },
+  },
+  isIsobmff,
+};
+
+static auto const registered = registerSpec(&specGimi);
\ No newline at end of file
diff --git a/tests/gimi/invalid-no-geo1-brand.asm b/tests/gimi/invalid-no-geo1-brand.asm
new file mode 100644
index 0000000..2a0989d
--- /dev/null
+++ b/tests/gimi/invalid-no-geo1-brand.asm
@@ -0,0 +1,16 @@
+%define BE(a) ( ((((a)>>24)&0xFF) << 0) + ((((a)>>16)&0xFF) << 8) + ((((a)>>8)&0xFF) << 16)  + ((((a)>>0)&0xFF) << 24))
+
+ftyp_start:
+    dd BE(ftyp_end - ftyp_start)
+    dd "ftyp"
+    db 0x61, 0x76, 0x69, 0x73 ; "major_brand(32)" ('avis') 
+    db 0x00, 0x00, 0x00, 0x00 ; "minor_version(32)" 
+    db 0x6D, 0x69, 0x66, 0x31 ; "compatible_brand(32)" ('mif1') 
+    db 0x61, 0x76, 0x69, 0x66 ; "compatible_brand(32)" ('avif') 
+    db 0x61, 0x76, 0x30, 0x31 ; "compatible_brand(32)" ('av01') 
+    db 0x61, 0x76, 0x69, 0x73 ; "compatible_brand(32)" ('avis') 
+    db 0x6D, 0x73, 0x66, 0x31 ; "compatible_brand(32)" ('msf1')  
+    db 0x69, 0x73, 0x6F, 0x37 ; "compatible_brand(32)" ('iso7')
+    db 0x6D, 0x69, 0x61, 0x66 ; "compatible_brand(32)" ('miaf') 
+    db 0x4D, 0x41, 0x31, 0x42 ; "compatible_brand(32)" ('MA1B') 
+ftyp_end:
\ No newline at end of file
diff --git a/tests/gimi/invalid-no-geo1-brand.ref b/tests/gimi/invalid-no-geo1-brand.ref
new file mode 100644
index 0000000..2ae5fd5
--- /dev/null
+++ b/tests/gimi/invalid-no-geo1-brand.ref
@@ -0,0 +1,36 @@
++--------------------------------------+
+|           gimi validation            |
++--------------------------------------+
+
+Specification description: GEOINT Imagery Media for ISR - NGA.STND.0076
+
+[gimi][Rule #0] Error: 'geo1' brand not found in 'ftyp' box
+[gimi][Rule #1] Error: 'unif' brand not found in 'ftyp' box
+
+========================================
+[gimi] 2 error(s), 0 warning(s).
+========================================
+
+===== Involved rules descriptions:
+
+[gimi][Rule #0] Requirement NGA.STND.0076_1.0-02
+An NGA.STND.0076_1.0 file shall include the 'geo1' brand in the
+compatible brands list.
+
+
+[gimi][Rule #1] Requirement NGA.STND.0076_1.0-03
+An NGA.STND.0076_1.0 file shall include the 'unif' brand in the
+compatible brands list.
+
+
++--------------------------------------+
+|          isobmff validation          |
++--------------------------------------+
+
+Specification description: ISO Base Media File Format
+MPEG-4 part 12 - ISO/IEC 14496-12 - m17277 (6th+FDAM1+FDAM2+COR1-R4)
+
+========================================
+[isobmff] No errors.
+========================================
+
diff --git a/tests/gimi/valid-gimi-ftyp.asm b/tests/gimi/valid-gimi-ftyp.asm
new file mode 100644
index 0000000..f97984d
--- /dev/null
+++ b/tests/gimi/valid-gimi-ftyp.asm
@@ -0,0 +1,17 @@
+%define BE(a) ( ((((a)>>24)&0xFF) << 0) + ((((a)>>16)&0xFF) << 8) + ((((a)>>8)&0xFF) << 16)  + ((((a)>>0)&0xFF) << 24))
+
+ftyp_start:
+    dd BE(ftyp_end - ftyp_start)
+    dd "ftyp"
+    db 0x61, 0x76, 0x69, 0x73 ; "major_brand(32)" ('avis') 
+    db 0x00, 0x00, 0x00, 0x00 ; "minor_version(32)" 
+    db 0x6D, 0x69, 0x66, 0x31 ; "compatible_brand(32)" ('mif1') 
+    db 0x61, 0x76, 0x69, 0x66 ; "compatible_brand(32)" ('avif') 
+    db 0x61, 0x76, 0x30, 0x31 ; "compatible_brand(32)" ('av01') 
+    db 0x61, 0x76, 0x69, 0x73 ; "compatible_brand(32)" ('avis') 
+    db 0x6D, 0x73, 0x66, 0x31 ; "compatible_brand(32)" ('msf1')  
+    db 0x67, 0x65, 0x6F, 0x31 ; "compatible_brand(32)" ('geo1')
+    db 0x75, 0x6E, 0x69, 0x66 ; "compatible_brand(32)" ('unif')
+    db 0x6D, 0x69, 0x61, 0x66 ; "compatible_brand(32)" ('miaf') 
+    db 0x4D, 0x41, 0x31, 0x42 ; "compatible_brand(32)" ('MA1B') 
+ftyp_end:
diff --git a/tests/gimi/valid-gimi-ftyp.ref b/tests/gimi/valid-gimi-ftyp.ref
new file mode 100644
index 0000000..ebd5a91
--- /dev/null
+++ b/tests/gimi/valid-gimi-ftyp.ref
@@ -0,0 +1,21 @@
++--------------------------------------+
+|           gimi validation            |
++--------------------------------------+
+
+Specification description: GEOINT Imagery Media for ISR - NGA.STND.0076
+
+========================================
+[gimi] No errors.
+========================================
+
++--------------------------------------+
+|          isobmff validation          |
++--------------------------------------+
+
+Specification description: ISO Base Media File Format
+MPEG-4 part 12 - ISO/IEC 14496-12 - m17277 (6th+FDAM1+FDAM2+COR1-R4)
+
+========================================
+[isobmff] No errors.
+========================================
+
diff --git a/tests/run b/tests/run
index 8df72ae..70ed5de 100755
--- a/tests/run
+++ b/tests/run
@@ -18,6 +18,7 @@ function main
   run_test check_rules_folder heif mp4 ""
   run_test check_rules_folder miaf hif ""
   run_test check_rules_folder avif avif ""
+  run_test check_rules_folder gimi gimi ""
   run_test check_rules_folder av1hdr10plus obu "| grep -v isobmff"
   run_test check_rules_folder av1hdr10plus mp4 "| grep isobmff"
   run_test check_rules_folder av1isobmff mp4 ""