If you are cooking steaks on a piece of cheap nasty plastic developed by a brain-damaged boxer you need psychiatric help found in the telephone directory under "self-harm"
Spend some of your hard-earned poker dollars on a non-stick coated cast iron griddle or frying pan which feels like it would break your foot if you dropped it on it. The heavier the better; thick iron spreads heat better than aluminium or cheap alloys and generates a searing and even scorch onto your steaks. Usually a good idea to heat it with some oil in and then wash it out before you use it. Put it on the hob (or whatever you call the hot things on top of your oven/cooker in america) and whack it up to the max. It should be so hot you can see the air shimmering above, and a tiny bit of smoke if you didnt clean off the last lot of oil quite as well as you might've (!).
Grab a beer.
Now, take the delicious steaks that you bought earlier that day and which have been sat in your kitchen at room temperature (NOT getting tough and fibrous in the fridge or, much worse, the freezer). Whack on the pan. It will hiss and sizzle like hell. If it's an inch or so thick you're looking at about 2 minutes on each side for medium-rare. Add another minute for medium, another on top of that for well done and another minute or two for brown/burnt if you're a masochist. Always cook on the rarer side of what you like; you can always throw it back on for a minute but you can't take the heat out if you brown it too much!
Give it about a minute on a plate to rest and seal in the juices when you take it off the heat. This is important for it to taste f'ing great. Not long enough for it to get cold, though, but it shouldn't cool too quick until you cut into it.
Have lots of cool beer and some thick cut potato wedges or french fries on the side. Green salad with olive oil and balsamic vinegar hits the spot too, if you're keen to include something semi-healthy. If you've never tried steak with bearnaise sauce, find a recipe and give it a try, it's a doddle to make and is DELICIOUS with medium-rare steaks. Oh, and buy the best steaks for you, people tend to buy particular fillets or t-bones because they're told they ought to; trust your own tastebuds and go for one you find tastey, and buy the best you can afford.
The GF grill is great for lots of things but it isn't hot enough to cook steaks. Nowhere near. You'll end up steaming them and they will taste like Bielsebub's wife's used sanitary towels. Honestly.