Index: binaries/data/mods/public/gui/session/selection_panels.js
===================================================================
--- binaries/data/mods/public/gui/session/selection_panels.js
+++ binaries/data/mods/public/gui/session/selection_panels.js
@@ -42,6 +42,9 @@
 	},
 	"getItems": function(unitEntStates)
 	{
+		if (unitEntStates[0]?.player == 0)
+			return [];
+
 		return unitEntStates.some(state => !!state.alertRaiser) ? ["raise", "end"] : [];
 	},
 	"setupButton": function(data)
@@ -379,6 +382,9 @@
 	"rowLength": 10,
 	"getItems": function(unitEntStates)
 	{
+		if (unitEntStates[0]?.player == 0)
+			return [];
+
 		let hideLocked = unitEntStates.every(state => !state.gate || !state.gate.locked);
 		let hideUnlocked = unitEntStates.every(state => !state.gate || state.gate.locked);
 
@@ -644,6 +650,9 @@
 	"rowLength": 10,
 	"getItems": function(unitEntStates)
 	{
+		if (unitEntStates[0]?.player == 0)
+			return [];
+
 		let ret = [];
 		if (unitEntStates.length == 1)
 		{
@@ -1104,6 +1113,9 @@
 	"rowLength": 10,
 	"getItems": function(unitEntStates)
 	{
+		if (unitEntStates[0]?.player == 0)
+			return false;
+
 		// Interface becomes complicated with multiple different units and this is meant per-entity, so prevent it if the selection has multiple different units.
 		if (unitEntStates.some(state => state.template != unitEntStates[0].template))
 			return false;
Index: binaries/data/mods/public/gui/session/unit_commands.js
===================================================================
--- binaries/data/mods/public/gui/session/unit_commands.js
+++ binaries/data/mods/public/gui/session/unit_commands.js
@@ -138,10 +138,10 @@
 	// for which the entity does not need to be owned.
 	setupUnitPanel("Command", entStates, playerState);
 
-	if (g_IsObserver || entStates.every(entState =>
-		controlsPlayer(entState.player) &&
-		(!entState.identity || entState.identity.controllable)) ||
-		playerState.controlsAll)
+	const isObserverOrController = g_IsObserver || entStates.every(entState => controlsPlayer(entState.player) &&
+			(!entState.identity || entState.identity.controllable)) || playerState.controlsAll;
+
+	if (isObserverOrController)
 	{
 		for (let guiName of g_PanelsOrder)
 		{
@@ -152,8 +152,11 @@
 			setupUnitPanel(guiName, entStates, playerStates[entStates[0].player]);
 		}
 
-		supplementalDetailsPanel.hidden = false;
-		commandsPanel.hidden = false;
+		const panelsAreUnused = !Object.values(g_SelectionPanels).some(panel => panel.used);
+		const isOwnedByGaia = entStates[0].player == 0;
+
+		supplementalDetailsPanel.hidden = panelsAreUnused;
+		commandsPanel.hidden = panelsAreUnused || isOwnedByGaia;
 	}
 	else if (playerState.isMutualAlly[entStates[0].player])
 	{
@@ -162,7 +165,6 @@
 		setupUnitPanel("Garrison", entStates, playerState);
 
 		supplementalDetailsPanel.hidden = !g_SelectionPanels.Garrison.used;
-
 		commandsPanel.hidden = true;
 	}
 	else
@@ -191,6 +193,8 @@
 	for (let ent of selection)
 	{
 		let state = GetEntityState(ent);
+		if (state?.player == 0)
+			return [];
 		if (state?.trainer?.entities?.length)
 		{
 			if (!state.production)
Index: binaries/data/mods/public/simulation/components/GuiInterface.js
===================================================================
--- binaries/data/mods/public/simulation/components/GuiInterface.js
+++ binaries/data/mods/public/simulation/components/GuiInterface.js
@@ -886,6 +886,9 @@
 
 GuiInterface.prototype.GetAllBuildableEntities = function(player, cmd)
 {
+	if (IsOwnedByGaia(cmd.entities[0]))
+		return [];
+
 	let buildableEnts = [];
 	for (let ent of cmd.entities)
 	{