Managing to get GBM working

assets/shaders/textured.vert

@@ -1,6 +1,9 @@
-#version 130
-#extension GL_ARB_separate_shader_objects : enable
-#extension GL_ARB_explicit_attrib_location : enable
+#version 320 es
+#ifdef GL_ES
+  
+#else
+  #extension GL_ARB_separate_shader_objects : enable
+#endif
 
 layout (location = 0) in vec3 aPos;
 layout (location = 1) in vec2 aTexCoord;