Tyically, your gums will bleed when brushing for three reasons: brushing too hard, poor gum health or medical conditions that cause bleeding gums.
When you say "gushing" that is an alarming sign so, as Connie recommended, please see a doctor or dentist ASAP.
Don't worry yet though because sometimes people's gums will bleed a lot if there is a nutritional deficiency such as low vitamin K or early gum disease like gingivitis, both can be remedied easily. Some medications that cause bleeding gums, too.