diff --git a/Source/system/gpio.c b/Source/system/gpio.c
new file mode 100644
--- /dev/null
+++ b/Source/system/gpio.c
@@ -0,0 +1,36 @@
+//
+// GPIO: Configure and initialize GPIOs
+//
+
+#include "config.h"
+#include "system/gpio.h"
+#include "stm32f0xx_hal.h"
+
+
+// Private variables
+static uint8_t shutdown_triggered = 0;
+static uint32_t shutdown_triggered_time = 0;
+
+
+// Initialize GPIOs
+void gpio_init(void)
+{
+  GPIO_InitTypeDef GPIO_InitStruct;
+
+  // Enable clocks
+  __GPIOC_CLK_ENABLE();
+  __GPIOF_CLK_ENABLE();
+  __GPIOA_CLK_ENABLE();
+  __GPIOB_CLK_ENABLE();
+
+  // LEDs 1/2
+  GPIO_InitStruct.Pin = PIN_LED_POWER;
+  GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
+  GPIO_InitStruct.Pull = GPIO_NOPULL;
+  GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
+  HAL_GPIO_Init(PORT_LED_POWER, &GPIO_InitStruct);
+
+
+  // Toggle the power LED
+  HAL_GPIO_TogglePin(LED_POWER);
+}