Long story short: Every G/A has a gradient, if not specifically stated 2,5 % i think. You are supposed to know your sinle engine performance and not exceed the gradient weight - how is it done - a different story. So if G/A from applicable MDA DA - fly go around track. If G/A is initiated below DA MDA or past MAPt you're lost in woodwork, unless you have an EOSID which you are familiar with and follow it. On the other hand some reasonable assumptions can be made such as approach to CAT III (g/a routing from the deck published) runway and you use CAT I minima with engine out. At 100' you need to do a G/A - either you use EOSID or if the G/A procedure is identical to CAT III you may as well fly it. Technically you are not flying the G/A for CATI which no longer protects you because you are already below DA, but you choose to fly another (albeit identical) procedure which provides protection - you are above DH/A and before MAPt.