diff --git a/conf/firmwares/subsystems/shared/gps_multi.makefile b/conf/firmwares/subsystems/shared/gps_multi.makefile
new file mode 100644
index 0000000000..109662a561
--- /dev/null
+++ b/conf/firmwares/subsystems/shared/gps_multi.makefile
@@ -0,0 +1,37 @@
+# Hey Emacs, this is a -*- makefile -*-
+
+GPS_LED ?= none
+GPS_PRIMARY_PORT_LOWER=$(shell echo $(GPS_PRIMARY_PORT) | tr A-Z a-z)
+GPS_SECONDARY_PORT_LOWER=$(shell echo $(GPS_SECONDARY_PORT) | tr A-Z a-z)
+
+ap.CFLAGS += -DUSE_GPS
+ap.CFLAGS += -DUSE_MULTI_GPS
+ap.CFLAGS += -DUSE_$(GPS_PRIMARY_PORT) -D$(GPS_PRIMARY_PORT)_BAUD=$(GPS_PRIMARY_BAUD)
+ap.CFLAGS += -DUSE_$(GPS_SECONDARY_PORT) -D$(GPS_SECONDARY_PORT)_BAUD=$(GPS_SECONDARY_BAUD)
+ap.CFLAGS += -DGPS_PRIMARY_PORT=$(GPS_PRIMARY_PORT_LOWER) 
+ap.CFLAGS += -DGPS_SECONDARY_PORT=$(GPS_SECONDARY_PORT_LOWER)
+
+ap.CFLAGS += -DPRIMARY_GPS_TYPE_H=\"subsystems/gps/gps_ubx.h\"
+ap.CFLAGS += -DSECONDARY_GPS_TYPE_H=\"subsystems/gps/gps_piksi.h\"
+
+ap.srcs += $(SRC_SUBSYSTEMS)/gps/gps_piksi.c
+ap.srcs += $(SRC_SUBSYSTEMS)/gps/gps_ubx.c
+ap.srcs += $(SRC_SUBSYSTEMS)/gps.c
+
+ap.CFLAGS += -DGPS_PRIMARY_$(GPS_PRIMARY_TYPE)
+ap.CFLAGS += -DGPS_SECONDARY_$(GPS_SECONDARY_TYPE)
+
+ifeq (PIKSI,$(filter PIKSI,$(GPS_PRIMARY_TYPE) $(GPS_SECONDARY_TYPE)))
+  # libsbp
+  ap.CFLAGS += -I$(PAPARAZZI_SRC)/sw/ext/libsbp/c/include
+  ap.srcs		+= $(PAPARAZZI_SRC)/sw/ext/libsbp/c/src/sbp.c $(PAPARAZZI_SRC)/sw/ext/libsbp/c/src/edc.c
+endif
+
+ifneq ($(GPS_LED),none)
+  ap.CFLAGS += -DGPS_LED=$(GPS_LED)
+endif
+
+nps.CFLAGS += -DUSE_GPS
+nps.srcs += $(SRC_SUBSYSTEMS)/gps.c
+nps.CFLAGS += -DGPS_TYPE_H=\"subsystems/gps/gps_sim_nps.h\"
+nps.srcs += $(SRC_SUBSYSTEMS)/gps/gps_sim_nps.c
\ No newline at end of file