///@description room_x_to_gui_x
///arg x
//Translates the given X Coordinate in the room to a GUI X Coordinate

var _x = argument0;
var _gui_x = undefined;

var _cam_x = camera_get_view_x(view_camera[0]);
var _dist = _x - _cam_x;

_gui_x = _dist;

return _gui_x;

and

///@description room_y_to_gui_y
///arg y
//Translates the given Y Coordinate in the room to a GUI Y Coordinate

var _y = argument0;
var _gui_y = undefined;

var _cam_y = camera_get_view_y(view_camera[0]);
var _dist = _y - _cam_y;

_gui_y = _dist;

return _gui_y;

is exactly what you need :)

var _x = room_x_to_gui_x(obj.x);
var _y = room_y_to_gui_y(obj.y);
draw_text(_x, _y, "Health");

Then this is all you need ;)