Can this circuit be built from Logicly's existing gates and other components? If so, you should follow the instructions to create a custom integrated circuit. It's easy to copy and paste custom circuits between documents, so you should only need to create it once and it will be reusable in all of your documents.
If you cannot create the circuit from the existing components, please visit the contact page and follow the instructions to submit a feature request. Be sure to explain why you are unable build it as a custom circuit using the existing components. Also, please consider including web links to relevant information that helps to explain the purpose of the circuit.