Does my guinea pig have heat stroke?? ASAP please!?

Guinea pigs do not tolerate temperatures over 80-85F (6-30C) at all well. It could be heat stroke or heat exhaustion. If you do not get him into the cool and get some fluid and electrolytes into him ASAP he will not make it. His age is not helping a bit. Try dropper/syringe feeding him some gator ade or pedilyte. Get him into an airconditioned place RIGHT NOW!!!!!