diff --git a/CMakeLists.txt b/CMakeLists.txt
index d18b7d12a9..63387a52cb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -62,9 +62,6 @@ endif()
 
 # gsrunner
 if(ENABLE_GSRUNNER)
-	if (NOT WIN32 AND NOT APPLE)
-		message(WARNING "GSRunner is only supported on Windows and macOS and may not build on your system")
-	endif()
 	add_subdirectory(pcsx2-gsrunner)
 else()
 	add_subdirectory(pcsx2-gsrunner EXCLUDE_FROM_ALL)
diff --git a/pcsx2-gsrunner/Main.cpp b/pcsx2-gsrunner/Main.cpp
index cbc2fb1a97..9242821f4b 100644
--- a/pcsx2-gsrunner/Main.cpp
+++ b/pcsx2-gsrunner/Main.cpp
@@ -47,6 +47,15 @@
 
 #include "svnrev.h"
 
+// Down here because X11 has a lot of defines that can conflict
+#if defined(__linux__)
+#include <SDL2/SDL.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <sys/select.h>
+#include <unistd.h>
+#endif
+
 namespace GSRunner
 {
 	static void InitializeConsole();
@@ -1086,4 +1095,118 @@ void GSRunner::StopPlatformMessagePump()
 	CocoaTools::StopMainThreadEventLoop();
 }
 
+#elif defined(__linux__)
+static Display* s_display = nullptr;
+static Window s_window = None;
+static WindowInfo s_wi;
+static std::atomic<bool> s_shutdown_requested{false};
+
+bool GSRunner::CreatePlatformWindow()
+{
+	pxAssertRel(!s_display && s_window == None, "Tried to create window when there already was one!");
+
+	s_display = XOpenDisplay(nullptr);
+	if (!s_display)
+	{
+		Console.Error("Failed to open X11 display");
+		return false;
+	}
+
+	int screen = DefaultScreen(s_display);
+	Window root = RootWindow(s_display, screen);
+
+	s_window = XCreateSimpleWindow(s_display, root, 0, 0, WINDOW_WIDTH, WINDOW_HEIGHT, 1,
+		BlackPixel(s_display, screen), WhitePixel(s_display, screen));
+
+	if (s_window == None)
+	{
+		Console.Error("Failed to create X11 window");
+		XCloseDisplay(s_display);
+		s_display = nullptr;
+		return false;
+	}
+
+	XStoreName(s_display, s_window, "PCSX2 GS Runner");
+	XSelectInput(s_display, s_window, StructureNotifyMask);
+	XMapWindow(s_display, s_window);
+
+	s_wi.type = WindowInfo::Type::X11;
+	s_wi.display_connection = s_display;
+	s_wi.window_handle = reinterpret_cast<void*>(s_window);
+	s_wi.surface_width = WINDOW_WIDTH;
+	s_wi.surface_height = WINDOW_HEIGHT;
+	s_wi.surface_scale = 1.0f;
+
+	XFlush(s_display);
+	PumpPlatformMessages();
+	return true;
+}
+
+void GSRunner::DestroyPlatformWindow()
+{
+	if (s_display && s_window != None)
+	{
+		XDestroyWindow(s_display, s_window);
+		s_window = None;
+	}
+
+	if (s_display)
+	{
+		XCloseDisplay(s_display);
+		s_display = nullptr;
+	}
+}
+
+std::optional<WindowInfo> GSRunner::GetPlatformWindowInfo()
+{
+	WindowInfo wi;
+	if (s_display && s_window != None)
+		wi = s_wi;
+	else
+		wi.type = WindowInfo::Type::Surfaceless;
+	return wi;
+}
+
+void GSRunner::PumpPlatformMessages(bool forever)
+{
+	if (!s_display)
+		return;
+
+	do
+	{
+		while (XPending(s_display) > 0)
+		{
+			XEvent event;
+			XNextEvent(s_display, &event);
+
+			switch (event.type)
+			{
+				case ConfigureNotify:
+				{
+					const XConfigureEvent& configure = event.xconfigure;
+					s_wi.surface_width = static_cast<u32>(configure.width);
+					s_wi.surface_height = static_cast<u32>(configure.height);
+					break;
+				}
+				case DestroyNotify:
+					return;
+				default:
+					break;
+			}
+		}
+
+		if (s_shutdown_requested.load())
+			return;
+
+		if (forever)
+		{
+			std::this_thread::sleep_for(std::chrono::milliseconds(1));
+		}
+	} while (forever && !s_shutdown_requested.load());
+}
+
+void GSRunner::StopPlatformMessagePump()
+{
+	s_shutdown_requested.store(true);
+}
 #endif // _WIN32 / __APPLE__
diff --git a/pcsx2-gsrunner/test_run_dumps.py b/pcsx2-gsrunner/test_run_dumps.py
index b61db398fc..09debbd46a 100644
--- a/pcsx2-gsrunner/test_run_dumps.py
+++ b/pcsx2-gsrunner/test_run_dumps.py
@@ -73,7 +73,6 @@ def run_regression_test(runner, dumpdir, renderer, upscale, renderhacks, paralle
     #print("Running '%s'" % (" ".join(args)))
     subprocess.run(args, env=environ, stdin=subprocess.DEVNULL, stderr=subprocess.DEVNULL, stdout=subprocess.DEVNULL, creationflags=creationflags)
 
-
 def run_regression_tests(runner, gsdir, dumpdir, renderer, upscale, renderhacks, parallel=1):
     paths = glob.glob(gsdir + "/*.*", recursive=True)
     gamepaths = list(filter(lambda x: get_gs_name(x) is not None, paths))
@@ -104,12 +103,12 @@ def run_regression_tests(runner, gsdir, dumpdir, renderer, upscale, renderhacks,
 
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(description="Generate frame dump images for regression tests")
-    parser.add_argument("-runner", action="store", required=True, help="Path to PCSX2 GS runner")
-    parser.add_argument("-gsdir", action="store", required=True, help="Directory containing GS dumps")
-    parser.add_argument("-dumpdir", action="store", required=True, help="Base directory to dump frames to")
-    parser.add_argument("-renderer", action="store", required=False, help="Renderer to use")
+    parser.add_argument("-runner", action="store", required=True, type=str.strip, help="Path to PCSX2 GS runner")
+    parser.add_argument("-gsdir", action="store", required=True, type=str.strip, help="Directory containing GS dumps")
+    parser.add_argument("-dumpdir", action="store", required=True, type=str.strip, help="Base directory to dump frames to")
+    parser.add_argument("-renderer", action="store", required=False, type=str.strip, help="Renderer to use")
     parser.add_argument("-upscale", action="store", type=float, default=1, help="Upscaling multiplier to use")
-    parser.add_argument("-renderhacks", action="store", required=False, help="Enable HW Rendering hacks")
+    parser.add_argument("-renderhacks", action="store", required=False, type=str.strip, help="Enable HW Rendering hacks")
     parser.add_argument("-parallel", action="store", type=int, default=1, help="Number of processes to run")
 
     args = parser.parse_args()