I was GBS+ with Lachlan and this happened to me. Waters broke and nothing happened. Waters broke at 2am and we went into hopital at 7am and i was given till about 2pm till we decided with my midwife that it was time to induce. It was at this point that she was getting quite concerned about the risk of infection and i decided to induce as i had spent a day pacing the hospital trying to get labour going with absolutely nothing happening. As you know i went through the SMGP also. TBH i am in two minds about having the GBS test this time around. This is my experience but another friend of mine was GBS+ and her waters were broken whilst she was in labour so she got to labour at home etc. It just depends on what your body wants to do.