diff --git a/pkg/compiler/syscall.go b/pkg/compiler/syscall.go
index d5c7c5908..dd8394560 100644
--- a/pkg/compiler/syscall.go
+++ b/pkg/compiler/syscall.go
@@ -29,6 +29,7 @@ var syscalls = map[string]map[string]string{
 		"GetEntryScriptHash":     "System.Runtime.GetEntryScriptHash",
 		"GetExecutingScriptHash": "System.Runtime.GetExecutingScriptHash",
 
+		"GasLeft":      "System.Runtime.GasLeft",
 		"GetTrigger":   "System.Runtime.GetTrigger",
 		"CheckWitness": "System.Runtime.CheckWitness",
 		"Notify":       "System.Runtime.Notify",
diff --git a/pkg/core/interop/runtime/util.go b/pkg/core/interop/runtime/util.go
new file mode 100644
index 000000000..65ad6756c
--- /dev/null
+++ b/pkg/core/interop/runtime/util.go
@@ -0,0 +1,12 @@
+package runtime
+
+import (
+	"github.com/nspcc-dev/neo-go/pkg/core/interop"
+	"github.com/nspcc-dev/neo-go/pkg/vm"
+)
+
+// GasLeft returns remaining amount of GAS.
+func GasLeft(_ *interop.Context, v *vm.VM) error {
+	v.Estack().PushVal(int64(v.GasLimit - v.GasConsumed()))
+	return nil
+}
diff --git a/pkg/core/interop_system_test.go b/pkg/core/interop_system_test.go
index 613351459..436284bbb 100644
--- a/pkg/core/interop_system_test.go
+++ b/pkg/core/interop_system_test.go
@@ -5,6 +5,7 @@ import (
 	"testing"
 
 	"github.com/nspcc-dev/dbft/crypto"
+	"github.com/nspcc-dev/neo-go/pkg/core/interop/runtime"
 	"github.com/nspcc-dev/neo-go/pkg/core/state"
 	"github.com/nspcc-dev/neo-go/pkg/crypto/keys"
 	"github.com/nspcc-dev/neo-go/pkg/util"
@@ -197,3 +198,13 @@ func TestContractCreateAccount(t *testing.T) {
 		require.Error(t, contractCreateStandardAccount(ic, v))
 	})
 }
+
+func TestRuntimeGasLeft(t *testing.T) {
+	v, ic, chain := createVM(t)
+	defer chain.Close()
+
+	v.GasLimit = 100
+	v.AddGas(58)
+	require.NoError(t, runtime.GasLeft(ic, v))
+	require.EqualValues(t, 42, v.Estack().Pop().BigInt().Int64())
+}
diff --git a/pkg/core/interops.go b/pkg/core/interops.go
index b8d78bca6..3ad59985a 100644
--- a/pkg/core/interops.go
+++ b/pkg/core/interops.go
@@ -107,6 +107,7 @@ var systemInterops = []interop.Function{
 	{Name: "System.Json.Deserialize", Func: json.Deserialize, Price: 500000},
 	{Name: "System.Json.Serialize", Func: json.Serialize, Price: 100000},
 	{Name: "System.Runtime.CheckWitness", Func: runtime.CheckWitness, Price: 30000},
+	{Name: "System.Runtime.GasLeft", Func: runtime.GasLeft, Price: 400},
 	{Name: "System.Runtime.GetCallingScriptHash", Func: engineGetCallingScriptHash, Price: 400},
 	{Name: "System.Runtime.GetEntryScriptHash", Func: engineGetEntryScriptHash, Price: 400},
 	{Name: "System.Runtime.GetExecutingScriptHash", Func: engineGetExecutingScriptHash, Price: 400},
diff --git a/pkg/interop/runtime/runtime.go b/pkg/interop/runtime/runtime.go
index 916fed6fb..538f0f490 100644
--- a/pkg/interop/runtime/runtime.go
+++ b/pkg/interop/runtime/runtime.go
@@ -54,3 +54,9 @@ func Application() byte {
 func Verification() byte {
 	return 0x00
 }
+
+// GasLeft returns the amount of gas available for the current execution.
+// This function uses `System.Runtime.GasLeft` syscall.
+func GasLeft() int64 {
+	return 0
+}