Totally possible, I don't know about TOOLED, but it isn't outside of the realm of possibility.
IMO, when you take away strikes and an audience where the combat is meaningful for someone on GSP's level, one has to consider that GSP isn't an Abu Dhabi champion. Everybody loses in training and exhibitions one time or another, so I wouldn't put too much stock in this.
MY MMA RANKINGS
HW Cain JDS Werdum Cormier Barnett Bigfoot Overeem Mir Browne Nelson
LHW Jones Machida Evans Hendo Goose Teixeira Davis Shogun Mousasi Bader
MW ASilva Belfort Weidman Jacare Okami Rockhold Kennedy Consta Bisping Boetsch
WW GSP Hendricks Condit MacDonald Diaz Maia Fitch Kampmann Ellenberger Pyle
LW Bendo Alvarez Grant Melendez Thomson J.Miller Diaz Pettis Chandler dos Anjos Gray
FW Aldo Mendes Curran Lamas Frankie Zombie Cub Lentz Kawajiri Siver