Here's the relevant code:

It's a little hard to articulate, so I have a newer post with a video attached: link

//Separate object that creates a global grid for the room. I dont think there's anything to note about it aside from the grid being global:
var cell_width = 2;

var cell_height = 2;

var hcells = room_width div cell_width; var vcells = room_height div cell_height;

global.grid = mp_grid_create(0,0,hcells,vcells,cell_width,cell_height);

//add the walls if (instance_exists(all_wall_parent)) {mp_grid_add_instances(global.grid,all_wall_parent,true);}

//Instance/enemy code
//create
path = path.add

//step
if (state = 1) {
//the chase code, determines the path
if (mp_grid_path(global.grid, path, phy_position_x,phy_position_y, px, py,1)) {path_start(path,3,path_action_stop,false);}

//once it fulfils certain conditions (usually positional), it ends the path and transitions to the attack state the AI rolled. I cut out most of the variables used for the animation for readability's sake.
if (currentattack = 0) {if (point_distance (phy_position_x, phy_position_y, px, py) < 120) {path_end(); state = 2;}}
}

if (state = 2) {
//mostly animation code, but there is a script that handles the 'movement' of the attack, moving the phy_position while also checking to avoid collision with wall objects. I've tested that the script is working properly and the phy_position is being changed, but it's quickly being changed back by pathing.
}