diff --git a/src/Prometheus.jl b/src/Prometheus.jl
index ceea9f3..13fe169 100644
--- a/src/Prometheus.jl
+++ b/src/Prometheus.jl
@@ -463,71 +463,6 @@ function collect!(metrics::Vector, family::Family{C}) where C
     return metrics
 end
 
-############################
-# GCCollector <: Collector #
-############################
-
-mutable struct GCCollector <: Collector
-    function GCCollector(registry::Union{CollectorRegistry, Nothing}=DEFAULT_REGISTRY)
-        gcc = new()
-        if registry !== nothing
-            register(registry, gcc)
-        end
-        return gcc
-    end
-end
-
-function metric_names(::GCCollector)
-    return (
-        "gc_alloc_total", "gc_free_total", "gc_alloc_bytes_total",
-        "gc_live_bytes", "gc_seconds_total", "gc_collections_total",
-    )
-end
-
-function collect!(metrics::Vector, ::GCCollector)
-    # See base/timing.jl
-    gc_num = Base.gc_num()
-    gc_live_bytes = Base.gc_live_bytes()
-    # Push all the metrics
-    push!(metrics,
-        Metric(
-            "counter", "gc_alloc_total", "Total number of allocations (calls to malloc, realloc, etc)",
-            LabelNames(["type"]),
-            [
-                Sample(nothing, LabelValues(["bigalloc"]), gc_num.bigalloc),
-                Sample(nothing, LabelValues(["malloc"]), gc_num.malloc),
-                Sample(nothing, LabelValues(["poolalloc"]), gc_num.poolalloc),
-                Sample(nothing, LabelValues(["realloc"]), gc_num.realloc),
-            ],
-        ),
-        Metric(
-            "counter", "gc_free_total", "Total number of calls to free()",
-            nothing, Sample(nothing, nothing, gc_num.freecall),
-        ),
-        Metric(
-            "counter", "gc_alloc_bytes_total", "Total number of allocated bytes", nothing,
-            Sample(nothing, nothing, Base.gc_total_bytes(gc_num)),
-        ),
-        Metric(
-            "gauge", "gc_live_bytes", "Current number of live bytes", nothing,
-            Sample(nothing, nothing, gc_live_bytes),
-        ),
-        Metric(
-            "counter", "gc_seconds_total", "Total time spent in garbage collection", nothing,
-            Sample(nothing, nothing, gc_num.total_time / 10^9), # [ns] to [s]
-        ),
-        Metric(
-            "counter", "gc_collections_total", "Total number of calls to garbage collection",
-            LabelNames(["type"]),
-            [
-                Sample(nothing, LabelValues(["full"]), gc_num.full_sweep),
-                Sample(nothing, LabelValues(["minor"]), gc_num.pause - gc_num.full_sweep),
-            ],
-        ),
-    )
-    return metrics
-end
-
 
 ##############
 # Exposition #
@@ -690,6 +625,7 @@ function expose(http::HTTP.Stream, reg::CollectorRegistry = DEFAULT_REGISTRY; co
     return
 end
 
+include("gc_collector.jl")
 include("process_collector.jl")
 
 # Default registry and collectors
diff --git a/src/gc_collector.jl b/src/gc_collector.jl
new file mode 100644
index 0000000..c49a744
--- /dev/null
+++ b/src/gc_collector.jl
@@ -0,0 +1,64 @@
+############################
+# GCCollector <: Collector #
+############################
+
+mutable struct GCCollector <: Collector
+    function GCCollector(registry::Union{CollectorRegistry, Nothing}=DEFAULT_REGISTRY)
+        gcc = new()
+        if registry !== nothing
+            register(registry, gcc)
+        end
+        return gcc
+    end
+end
+
+function metric_names(::GCCollector)
+    return (
+        "gc_alloc_total", "gc_free_total", "gc_alloc_bytes_total",
+        "gc_live_bytes", "gc_seconds_total", "gc_collections_total",
+    )
+end
+
+function collect!(metrics::Vector, ::GCCollector)
+    # See base/timing.jl
+    gc_num = Base.gc_num()
+    gc_live_bytes = Base.gc_live_bytes()
+    # Push all the metrics
+    push!(metrics,
+        Metric(
+            "counter", "gc_alloc_total", "Total number of allocations (calls to malloc, realloc, etc)",
+            LabelNames(["type"]),
+            [
+                Sample(nothing, LabelValues(["bigalloc"]), gc_num.bigalloc),
+                Sample(nothing, LabelValues(["malloc"]), gc_num.malloc),
+                Sample(nothing, LabelValues(["poolalloc"]), gc_num.poolalloc),
+                Sample(nothing, LabelValues(["realloc"]), gc_num.realloc),
+            ],
+        ),
+        Metric(
+            "counter", "gc_free_total", "Total number of calls to free()",
+            nothing, Sample(nothing, nothing, gc_num.freecall),
+        ),
+        Metric(
+            "counter", "gc_alloc_bytes_total", "Total number of allocated bytes", nothing,
+            Sample(nothing, nothing, Base.gc_total_bytes(gc_num)),
+        ),
+        Metric(
+            "gauge", "gc_live_bytes", "Current number of live bytes", nothing,
+            Sample(nothing, nothing, gc_live_bytes),
+        ),
+        Metric(
+            "counter", "gc_seconds_total", "Total time spent in garbage collection", nothing,
+            Sample(nothing, nothing, gc_num.total_time / 10^9), # [ns] to [s]
+        ),
+        Metric(
+            "counter", "gc_collections_total", "Total number of calls to garbage collection",
+            LabelNames(["type"]),
+            [
+                Sample(nothing, LabelValues(["full"]), gc_num.full_sweep),
+                Sample(nothing, LabelValues(["minor"]), gc_num.pause - gc_num.full_sweep),
+            ],
+        ),
+    )
+    return metrics
+end