diff --git a/src/plugins/intel_gpu/src/graph/impls/ocl/gather_tree.cpp b/src/plugins/intel_gpu/src/graph/impls/ocl/gather_tree.cpp
index 7ee17e191b2..907c8ecb38e 100644
--- a/src/plugins/intel_gpu/src/graph/impls/ocl/gather_tree.cpp
+++ b/src/plugins/intel_gpu/src/graph/impls/ocl/gather_tree.cpp
@@ -39,7 +39,12 @@ struct gather_tree_impl : typed_primitive_impl_ocl<gather_tree> {
 
 namespace detail {
 attach_gather_tree_impl::attach_gather_tree_impl() {
-    auto types = {data_types::i32, data_types::f32};
+    auto types = {
+        data_types::f32,
+        data_types::f16,
+        data_types::i32
+    };
+
     auto formats = {
         format::yxfb,
         format::bfyx,
diff --git a/src/plugins/intel_gpu/src/kernel_selector/cl_kernels/gather_tree_gpu_ref.cl b/src/plugins/intel_gpu/src/kernel_selector/cl_kernels/gather_tree_gpu_ref.cl
index 0fe1b3d5f75..f560d7655fc 100644
--- a/src/plugins/intel_gpu/src/kernel_selector/cl_kernels/gather_tree_gpu_ref.cl
+++ b/src/plugins/intel_gpu/src/kernel_selector/cl_kernels/gather_tree_gpu_ref.cl
@@ -26,8 +26,8 @@ KERNEL(gather_tree_gpu_ref)(
     }
 
     for (int parent = beam; time >= 0; time--) {
-        output[OUTPUT_GET_INDEX(time, batch, beam, 0)] = step_input[INPUT0_GET_INDEX(time, batch, parent, 0)];
-        parent = parent_input[INPUT1_GET_INDEX(time, batch, parent, 0)];
+        output[OUTPUT_GET_INDEX(time, batch, beam, 0)] = TO_OUTPUT_TYPE(step_input[INPUT0_GET_INDEX(time, batch, parent, 0)]);
+        parent = (int)parent_input[INPUT1_GET_INDEX(time, batch, parent, 0)];
     }
     bool finished = false;
     for (int time = 0; time < max_sequence_in_beam; time++) {
diff --git a/src/plugins/intel_gpu/src/kernel_selector/kernels/gather_tree/gather_tree_kernel_ref.cpp b/src/plugins/intel_gpu/src/kernel_selector/kernels/gather_tree/gather_tree_kernel_ref.cpp
index f8676f9128b..93a22d11069 100644
--- a/src/plugins/intel_gpu/src/kernel_selector/kernels/gather_tree/gather_tree_kernel_ref.cpp
+++ b/src/plugins/intel_gpu/src/kernel_selector/kernels/gather_tree/gather_tree_kernel_ref.cpp
@@ -14,9 +14,13 @@ ParamsKey GatherTreeKernelRef::GetSupportedKey() const {
 
     k.EnableInputDataType(Datatype::INT32);
     k.EnableOutputDataType(Datatype::INT32);
+
     k.EnableInputDataType(Datatype::F32);
     k.EnableOutputDataType(Datatype::F32);
 
+    k.EnableInputDataType(Datatype::F16);
+    k.EnableOutputDataType(Datatype::F16);
+
     k.EnableInputLayout(DataLayout::bfyx);
     k.EnableOutputLayout(DataLayout::bfyx);
 
diff --git a/src/tests/functional/plugin/gpu/shared_tests_instances/single_layer_tests/gather_tree.cpp b/src/tests/functional/plugin/gpu/shared_tests_instances/single_layer_tests/gather_tree.cpp
index 82a94204d31..f70fb29ac97 100644
--- a/src/tests/functional/plugin/gpu/shared_tests_instances/single_layer_tests/gather_tree.cpp
+++ b/src/tests/functional/plugin/gpu/shared_tests_instances/single_layer_tests/gather_tree.cpp
@@ -13,6 +13,7 @@ namespace {
 
 const std::vector<InferenceEngine::Precision> netPrecisions = {
         InferenceEngine::Precision::FP32,
+        InferenceEngine::Precision::FP16,
         InferenceEngine::Precision::I32
 };