I have created a new custom page in alfresco and i want to give access that particular page for a particular group only. If there is any way please reply.
Thanks in advance.
One way to do this would be by using an evaluator on the Share module that contains your custom page, see https://docs.alfresco.com/5.2/concepts/dev-extensions-share-module-deployment.html
Your evaluator can check to see whether the user is in the appropriate group and then hide the module, if not, thus hiding the page.