diff --git a/hosts/common/programs/default.nix b/hosts/common/programs/default.nix
index 8e59ad11..ae74cc8a 100644
--- a/hosts/common/programs/default.nix
+++ b/hosts/common/programs/default.nix
@@ -64,6 +64,7 @@
     ./go2tv.nix
     ./gpodder.nix
     ./gpsd.nix
+    ./gps-share.nix
     ./grimshot.nix
     ./gst-device-monitor.nix
     ./gthumb.nix
diff --git a/hosts/common/programs/geoclue2.nix b/hosts/common/programs/geoclue2.nix
index 63c718d9..85cb67ab 100644
--- a/hosts/common/programs/geoclue2.nix
+++ b/hosts/common/programs/geoclue2.nix
@@ -32,6 +32,7 @@ in
     packageUnwrapped = pkgs.geoclue2-with-demo-agent;
     suggestedPrograms = [
       "geoclue-demo-agent"
+      "gps-share"
       "ols"  #< WiFi SSID -> lat/long lookups
       "satellite"  #< graphical view into GPS fix data
       "where-am-i"  #< handy debugging/testing tool
diff --git a/hosts/common/programs/gps-share.nix b/hosts/common/programs/gps-share.nix
new file mode 100644
index 00000000..80bdcc60
--- /dev/null
+++ b/hosts/common/programs/gps-share.nix
@@ -0,0 +1,22 @@
+# gps-share: <https://github.com/zeenix/gps-share>
+# takes a local GPS device (e.g. /dev/ttyUSB1) and makes it available over TCP/Avahi (multicast DNS).
+#
+# common usecases:
+# 1. make positioning available to any device on a network, even if that device has no local GPS
+#    - e.g. my desktop can use my phone's GPS device, if on the same network.
+# 2. allow multiple clients to share a GPS device.
+#    GPS devices are serial devices, and so only one process can consume the data at a time.
+#    gps-share can camp the serial device, and then allow *multiple* subscribers
+# 3. provide a *read-only* API to clients like Geoclue.
+#    that is, expose the GPS device *output* to a client, but don't let the client write to the device (e.g. enable/disable the GPS).
+#    this is the primary function i derive from gps-share
+{ ... }:
+{
+  sane.programs.gps-share = {
+    services.gps-share = {
+      description = "gps-share: make local GPS serial readings available over Avahi";
+      command = "gps-share";  #< TODO: do i need to run it with any args?
+      dependencyOf = [ "geoclue-agent" ];
+    };
+  };
+}