Cypher Gems in Neo4j 5 offers a range of lesser-known features that can have a significant impact on performance and data management. One such feature is Cypher Unicode Normalization, which helps to resolve issues with non-normalized strings in the database. Another feature is Property-Based Access Control, which allows for more fine-grained access control over node properties. Dynamic Labels enable dynamic labeling of nodes without having to use client-side variable sanitation and string concatenation. Type Predicate Expressions allow for type checking of properties, enabling more efficient querying. OPTIONAL CALL enables optional matching of subqueries, allowing for more flexible query logic. POINT indexes improve performance when rendering 3D graphics by quickly fetching nodes within a certain distance from the viewer's position. Improved syntax includes Scoped CALL and more compact CASE statements, making Cypher queries cleaner and easier to read. Graph Pattern Matching improvements include inline filtering in node patterns and label pattern expressions, enhancing the flexibility of query logic. Overall, these features showcase the evolution of Neo4j 5 and its capabilities for efficient data management and querying.