[Keyboard] add miller/gm-862 keyboard (#8230)

* add miller/gm-862 keyboard

* Update keyboards/miller/gm862/gm862.c

* Update keyboards/miller/gm862/gm862.h

* Update keyboards/miller/gm862/gm862.h

* Update keyboards/miller/gm862/readme.md

* Update keyboards/miller/gm862/readme.md

* Update keyboards/miller/gm862/readme.md

* Update keyboards/miller/gm862/readme.md

* Update config.h

* Update keyboards/miller/gm862/config.h

* Update keyboards/miller/gm862/readme.md

1 files changed, 19 insertions, 0 deletions

diff --git a/keyboards/miller/gm862/gm862.h b/keyboards/miller/gm862/gm862.h
new file mode 100644
index 000000000..2e16d8286
--- /dev/null
+++ b/keyboards/miller/gm862/gm862.h
@@ -0,0 +1,19 @@
+#pragma once
+
+#include "quantum.h"
+
+#define XXX KC_NO
+
+#define LAYOUT_60_ansi( \
+    K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, K0C, K0D,\
+    K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C, K1D,\
+    K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B,      K2D,\
+    K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A,           K3D,\
+    K40, K41, K42,           K45,                K49, K4A,      K4C, K4D \
+) { \
+    { K00, K01, K02, K03, K04, K05, K06, K07, K08, K09, K0A, K0B, K0C, K0D }, \
+    { K10, K11, K12, K13, K14, K15, K16, K17, K18, K19, K1A, K1B, K1C, K1D }, \
+    { K20, K21, K22, K23, K24, K25, K26, K27, K28, K29, K2A, K2B, XXX, K2D }, \
+    { K30, K31, K32, K33, K34, K35, K36, K37, K38, K39, K3A, XXX, XXX, K3D }, \
+    { K40, K41, K42, XXX, XXX, K45, XXX, XXX, XXX, K49, K4A, XXX, K4C, K4D }  \
+}