Add initial prototype.

4-high/gel/applet/demo/hello_gel/hello_sdl_gel.gpr

@@ -0,0 +1,21 @@
+with
+     "gel",
+     "lace_shared";
+
+project Hello_SDL_GEL
+is
+   for Object_Dir use "build";
+   for Exec_Dir   use ".";
+   for Main       use ("launch_hello_gel.adb");
+   for Languages  use ("Ada");
+
+   package Ide      renames Lace_shared.Ide;
+   package Builder  renames Lace_shared.Builder;
+   package Compiler renames Lace_shared.Compiler;
+   package Binder   renames Lace_shared.Binder;
+
+   package Linker is
+      for Default_Switches ("ada") use ("-lGL");
+   end Linker;
+
+end Hello_SDL_GEL;