I had one lifter I worked with, 17 years old, first week he came to train with us, with negligible weight training background squatted 355 for an easy triple, belt only, benched 200x3, and pulled 405 sumo for a double, belt only, at 158#'s bodyweight.
He had never deadlifted before, nor squatted below parallel.
That first week we just kept adding weight to the bar and having him triple to get a baseline.
He did one meet with us (USAPL)and totaled 1060 wearing only a belt and wraps at 164#'s with less than 3 months training.
That was pretty freaky. Unfortuately for us he is an exceptional hockey player and loved the game, so hockey won out.
Bottom line, gym lifts mean nothing. Post a total.