There's a bounty for this right? i spent nearly two full days at this

code/modules/shuttle/assault_pod.dm

@@ -35,7 +35,7 @@
 
 /obj/item/assault_pod/attack_self(mob/living/user)
 	var/target_area
-	target_area = input("Area to land", "Select a Landing Zone", target_area) as null|anything in GLOB.teleportlocs
+	target_area = tgui_input_list(user, "Area to land", "Select a Landing Zone", GLOB.teleportlocs)
 	if(!target_area)
 		return
 	var/area/picked_area = GLOB.teleportlocs[target_area]

code/modules/shuttle/navigation_computer.dm

@@ -346,7 +346,7 @@
 			L["([L.len]) [nav_beacon.name] locked"] = null
 
 	playsound(console, 'sound/machines/terminal_prompt.ogg', 25, 0)
-	var/selected = input("Choose location to jump to", "Locations", null) as null|anything in L
+	var/selected = tgui_input_list(usr, "Choose location to jump to", "Locations", L)
 	if(QDELETED(src) || QDELETED(target) || !isliving(target))
 		return
 	playsound(src, "terminal_type", 25, 0)

code/modules/shuttle/spaceship_navigation_beacon.dm

@@ -43,7 +43,7 @@
 	if(!I.tool_behaviour == TOOL_MULTITOOL)
 		return
 	if(panel_open)
-		var/new_name = "Beacon_[input("Enter the custom name for this beacon", "It be Beacon ..your input..") as text]"
+		var/new_name = "Beacon_[tgui_input_list(user, "Enter the custom name for this beacon", "It be Beacon ..your input..")]"
 		if(new_name && Adjacent(user))
 			name = new_name
 			to_chat(user, "<span class='notice'>You change beacon name to [name].</span>")