Open gates can be replaced with a number of synonyms, each varying slightly in meaning and implications. Entrance, access, or admittance all indicate a point of entry, but entrance implies a grander, more formal arrival. Access can refer to a broader range of points of entry, such as computer systems or websites. Admittance typically suggests permission or authorization to enter somewhere. Other possible synonyms include gateway or portal, both emphasizing a transition between two places. Finally, gap or breach might indicate a more literal opening or a weakness in a barrier. Overall, there are many ways to replace "open gates" depending on the context and intended emphasis.