No. A common misconception is that gross section properties are sufficient to accurately represent the behavior of reinforced concrete structures when evaluating drift, deflection, force redistribution, and stability.
ACI 318 recognizes that cracking significantly reduces member stiffness and therefore provides stiffness reduction requirements in Section 6.6.3.1.1 for specific member types.
An important consideration is that stiffness reductions should be applied consistently throughout the analysis and design process. For example, using reduced stiffness only for drift checks while unintentionally relying on gross stiffness for force distribution elsewhere in the structure may lead to unconservative results.
For additional discussion on this topic, including practical considerations related to stiffness modeling and serviceability behavior, see the recent NCSEA publication on serviceability, which addresses these concepts in greater depth.